Canon G1 X Mark III vs Nikon P900

The Canon PowerShot G1 X Mark III and the Nikon Coolpix P900 are two digital cameras that were officially introduced, respectively, in October 2017 and March 2015. Both the G1X Mark III and the P900 are fixed lens compact cameras that are based on an APS-C (G1X Mark III) and a 1/2.3-inch (P900) sensor. The Canon has a resolution of 24 megapixels, whereas the Nikon provides 15.9 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications

Canon G1 X Mark III		Nikon P900
Fixed lens compact camera		Fixed lens compact camera
24-72mm f/2.8-5.6		24-2000mm f/2.8-6.5
24 MP, APS-C Sensor		15.9 MP, 1/2.3" Sensor
1080/60p Video		1080/60p Video
ISO 100-25,600		ISO 100-6,400 (100 - 12,800)
Electronic viewfinder (2360k dots)		Electronic viewfinder (921k dots)
3.0 LCD, 1040k dots		3.0 LCD, 921k dots
Swivel touchscreen		Swivel screen (not touch-sensitive)
9 shutter flaps per second		7 shutter flaps per second
Weathersealed body		not weather sealed
200 shots per battery charge		360 shots per battery charge
115 x 78 x 51 mm, 399 g		140 x 103 x 137 mm, 899 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G1 X Mark III and the Nikon Coolpix P900? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

An illustration of the physical size and weight of the Canon G1 X Mark III and the Nikon P900 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon P900 is considerably larger (61 percent) than the Canon G1 X Mark III. Moreover, the P900 is substantially heavier (125 percent) than the G1X Mark III. It is worth mentioning in this context that the G1X Mark III is splash and dust resistant, while the P900 does not feature any corresponding weather-sealing.

Concerning battery life, the G1X Mark III gets 200 shots out of its NB-13L battery, while the P900 can take 360 images on a single charge of its EN-EL23 power pack. The power pack in the P900 can be charged via the USB port, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Body Specifications

	Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life 1	Weather Sealing	Camera Launch 2	Launch Price (USD)	Street Price
	Canon G1 X Mark III	4.5 in	3.1 in	2.0 in	14.1 oz	200	Y	Oct 2017	1,299
	Nikon P900	5.5 in	4.1 in	5.4 in	31.7 oz	360	n	Mar 2015	599
	Canon 6D Mark II	5.7 in	4.4 in	3.0 in	27.0 oz	1200	Y	Jun 2017	1,999
	Canon 80D	5.5 in	4.1 in	3.1 in	25.8 oz	960	Y	Feb 2016	1,199
	Canon SX540	4.7 in	3.2 in	3.6 in	15.6 oz	205	n	Jan 2016	399
	Fujifilm X100V	5.0 in	3.0 in	2.1 in	16.9 oz	420	Y	Feb 2020	1,399
	Fujifilm X-T3	5.2 in	3.7 in	2.3 in	19.0 oz	390	Y	Sep 2018	1,499
	Fujifilm X100F	5.0 in	3.0 in	2.0 in	16.5 oz	390	n	Jan 2017	1,299
	Nikon P950	5.5 in	4.3 in	5.9 in	35.5 oz	290	n	Jan 2020	799
	Nikon P1000	5.7 in	4.7 in	7.1 in	49.9 oz	250	n	Jul 2018	999
	Nikon D7500	5.4 in	4.1 in	2.9 in	25.4 oz	950	Y	Apr 2017	1,299
	Nikon B700	4.9 in	3.3 in	4.2 in	19.9 oz	350	n	Feb 2016	499
	Nikon B500	4.5 in	3.1 in	3.7 in	19.1 oz	600	n	Jan 2016	299
	Nikon L840	4.4 in	3.1 in	3.8 in	19.0 oz	590	n	Feb 2015	299
	Sony A6300	4.7 in	2.6 in	1.9 in	14.3 oz	400	Y	Feb 2016	999
	Sony A6500	4.7 in	2.6 in	2.1 in	16.0 oz	350	Y	Oct 2016	1,399
	Sony RX10 III	5.2 in	3.7 in	5.0 in	37.1 oz	420	Y	Mar 2016	1,499
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. (1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

Camera Model
Canon G1 X Mark III
Nikon P900
Canon 6D Mark II
Canon 80D
Canon SX540
Fujifilm X100V
Fujifilm X-T3
Fujifilm X100F
Nikon P950
Nikon P1000
Nikon D7500
Nikon B700
Nikon B500
Nikon L840
Sony A6300
Sony A6500
Sony RX10 III

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The P900 was launched at a markedly lower price (by 54 percent) than the G1X Mark III, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon G1 X Mark III features an APS-C sensor and the Nikon P900 a 1/2.3-inch sensor. The sensor area in the P900 is 92 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 5.6. The sensor in the G1X Mark III has a native 3:2 aspect ratio, while the one in the P900 offers a 4:3 aspect.

With 24MP, the G1X Mark III offers a higher resolution than the P900 (15.9MP), but the G1X Mark III nevertheless has larger individual pixels (pixel pitch of 3.72μm versus 1.33μm for the P900) due to its larger sensor. Moreover, the G1X Mark III is a much more recent model (by 2 years and 7 months) than the P900, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the P900 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Canon G1 X Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G1X Mark III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Nikon P900 are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.

The G1X Mark III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon PowerShot G1 X Mark III has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Nikon Coolpix P900 are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-12800.

For many cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics

	Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
	Canon G1 X Mark III	APS-C	24.0	6000	4000	1080/60p	..	..	..	..
	Nikon P900	1/2.3	15.9	4608	3456	1080/60p	..	..	..	..
	Canon 6D Mark II	Full Frame	26.0	6240	4160	1080/60p	24.4	11.9	2862	85
	Canon 80D	APS-C	24.0	6000	4000	1080/60p	23.6	13.2	1135	79
	Canon SX540	1/2.3	20.2	5184	3888	1080/60p	..	..	..	..
	Fujifilm X100V	APS-C	26.0	6240	4160	4K/30p	..	..	..	..
	Fujifilm X-T3	APS-C	26.0	6240	4160	4K/60p	..	..	..	..
	Fujifilm X100F	APS-C	24.0	6000	4000	1080/60p	..	..	..	..
	Nikon P950	1/2.3	15.9	4608	3456	4K/30p	..	..	..	..
	Nikon P1000	1/2.3	15.9	4608	3456	4K/30p	..	..	..	..
	Nikon D7500	APS-C	20.7	5568	3712	4K/30p	24.3	14.0	1483	86
	Nikon B700	1/2.3	20.2	5184	3888	4K/30p	..	..	..	..
	Nikon B500	1/2.3	15.9	4608	3456	1080/60i	..	..	..	..
	Nikon L840	1/2.3	15.9	4608	3456	1080/60i	..	..	..	..
	Sony A6300	APS-C	24.0	6000	4000	4K/30p	24.4	13.7	1437	85
	Sony A6500	APS-C	24.0	6000	4000	4K/30p	24.5	13.7	1405	85
	Sony RX10 III	1-inch	20.0	5472	3648	4K/30p	23.1	12.6	472	70

Camera Model
Canon G1 X Mark III
Nikon P900
Canon 6D Mark II
Canon 80D
Canon SX540
Fujifilm X100V
Fujifilm X-T3
Fujifilm X100F
Nikon P950
Nikon P1000
Nikon D7500
Nikon B700
Nikon B500
Nikon L840
Sony A6300
Sony A6500
Sony RX10 III

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (1080/60p).

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the G1X Mark III offers a substantially higher resolution than the one in the P900 (2360k vs 921k dots). The table below summarizes some of the other core capabilities of the Canon G1 X Mark III and Nikon P900 in connection with corresponding information for a sample of similar cameras.

Core Features

	Camera Model	Viewfinder (Type or 000 dots)	Control Panel (yes/no)	LCD Size (inch)	LCD Resolution (000 dots)	LCD Attach- ment	Touch Screen (yes/no)	Mech Shutter Speed	Shutter Flaps (1/sec)	Built-in Flash (yes/no)	Built-in Image Stab
	Canon G1 X Mark III	2360	n	3.0	1040	swivel	Y	1/2000s	9.0	Y	Y
	Nikon P900	921	n	3.0	921	swivel	n	1/4000s	7.0	Y	Y
	Canon 6D Mark II	optical	Y	3.0	1040	swivel	Y	1/4000s	6.5	n	n
	Canon 80D	optical	Y	3.0	1040	swivel	Y	1/8000s	7.0	Y	n
	Canon SX540	none	n	3.0	461	fixed	n	1/2000s	5.9	Y	Y
	Fujifilm X100V	3690	n	3.0	1620	tilting	Y	1/4000s	11.0	Y	n
	Fujifilm X-T3	3690	n	3.0	1040	tilting	Y	1/8000s	11.0	n	n
	Fujifilm X100F	2360	n	3.0	1040	fixed	n	1/4000s	8.0	Y	n
	Nikon P950	2359	n	3.2	921	swivel	n	1/4000s	7.0	Y	Y
	Nikon P1000	2359	n	3.2	921	swivel	n	1/4000s	7.0	Y	Y
	Nikon D7500	optical	Y	3.2	922	tilting	Y	1/8000s	8.0	Y	n
	Nikon B700	921	n	3.0	921	swivel	n	1/4000s	5.0	Y	Y
	Nikon B500	none	n	3.0	921	tilting	n	1/4000s	7.4	Y	Y
	Nikon L840	none	n	3.0	921	tilting	n	1/4000s	7.4	Y	Y
	Sony A6300	2359	n	3.0	922	tilting	n	1/4000s	11.0	Y	n
	Sony A6500	2359	n	3.0	922	tilting	Y	1/4000s	11.0	Y	Y
	Sony RX10 III	2359	Y	3.0	1229	tilting	n	1/2000s	14.0	Y	Y

Camera Model
Canon G1 X Mark III
Nikon P900
Canon 6D Mark II
Canon 80D
Canon SX540
Fujifilm X100V
Fujifilm X-T3
Fujifilm X100F
Nikon P950
Nikon P1000
Nikon D7500
Nikon B700
Nikon B500
Nikon L840
Sony A6300
Sony A6500
Sony RX10 III

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G1X Mark III has a touchscreen, while the P900 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The Canon G1 X Mark III and the Nikon P900 both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Both the G1X Mark III and the P900 have zoom lenses built in. The G1X Mark III has a 24-72mm f/2.8-5.6 optic and the P900 offers a 24-2000mm f/2.8-6.5 (focal lengths in full frame equivalent terms). Hence, the Canon and Nikon provide the same view at the wide-angle end, but the Nikon has more tele-photo reach at the long end. Both cameras offer the same maximum aperture.

Concerning the storage of imaging data, both the G1X Mark III and the P900 write their files to SDXC cards. The G1X Mark III supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the P900 cannot take advantage of Ultra High Speed SD cards.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon PowerShot G1 X Mark III and Nikon Coolpix P900 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections

	Camera Model	Hotshoe Port	Internal Microphone	Internal Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
	Canon G1 X Mark III	Y	stereo	mono	-	-	micro	2.0	Y	Y	Y
	Nikon P900	-	stereo	mono	-	-	micro	2.0	Y	Y	-
	Canon 6D Mark II	Y	stereo	mono	Y	-	mini	2.0	Y	Y	Y
	Canon 80D	Y	stereo	mono	Y	Y	mini	2.0	Y	Y	-
	Canon SX540	-	stereo	mono	-	-	mini	2.0	Y	Y	-
	Fujifilm X100V	Y	stereo	mono	Y	-	micro	3.1	Y	-	Y
	Fujifilm X-T3	Y	stereo	mono	Y	Y	micro	3.1	Y	-	Y
	Fujifilm X100F	Y	stereo	mono	Y	-	micro	2.0	Y	-	-
	Nikon P950	Y	stereo	mono	Y	-	micro	2.0	Y	-	Y
	Nikon P1000	Y	stereo	mono	Y	-	micro	2.0	Y	-	Y
	Nikon D7500	Y	stereo	mono	Y	Y	mini	2.0	Y	-	Y
	Nikon B700	-	stereo	mono	-	-	micro	2.0	Y	Y	Y
	Nikon B500	-	stereo	mono	-	-	micro	2.0	Y	Y	Y
	Nikon L840	-	stereo	mono	-	-	micro	2.0	Y	Y	-
	Sony A6300	Y	stereo	mono	Y	-	micro	2.0	Y	Y	-
	Sony A6500	Y	stereo	mono	Y	-	micro	2.0	Y	Y	-
	Sony RX10 III	Y	stereo	mono	Y	Y	micro	2.0	Y	Y	-

Camera Model
Canon G1 X Mark III
Nikon P900
Canon 6D Mark II
Canon 80D
Canon SX540
Fujifilm X100V
Fujifilm X-T3
Fujifilm X100F
Nikon P950
Nikon P1000
Nikon D7500
Nikon B700
Nikon B500
Nikon L840
Sony A6300
Sony A6500
Sony RX10 III

It is notable that the G1X Mark III has a hotshoe, while the P900 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Travel and landscape photographers will find it useful that the P900 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The G1X Mark III is a recent model that features in the current product line-up of Canon. In contrast, the P900 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the P900 was succeeded by the Nikon P950. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Nikon websites.

Review summary

So what is the bottom line? Which of the two cameras – the Canon G1 X Mark III or the Nikon P900 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon PowerShot G1 X Mark III:

• More detail: Offers more megapixels (24 vs 15.9MP) with a 25% higher linear resolution.
• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Better image quality: Features a larger and more technologically advanced imaging sensor.
• Richer colors: The sensor size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• More detailed viewfinder: Has higher resolution electronic viewfinder (2360k vs 921k dots).
• More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Faster burst: Shoots at higher frequency (9 vs 7 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (115x78mm vs 140x103mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 500g or 56 percent) and hence easier to carry around.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Reflects 2 years and 7 months of technical progress since the P900 launch.

Advantages of the Nikon Coolpix P900:

• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
• More tele-reach: Has a longer tele-lens for perspective compression and subject magnification.
• Longer lasting: Gets more shots (360 versus 200) out of a single battery charge.
• Easier travel charging: Can be conveniently charged via its USB port.
• Easier geotagging: Features an internal GPS sensor to log localization data.
• More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in March 2015).

If the number of relative strengths (bullet points above) is taken as a guide, the G1X Mark III is the clear winner of the match-up (18 : 7 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

How about other alternatives? Do the specifications of the Canon G1 X Mark III and the Nikon P900 place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best Superzoom Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the G1X Mark III or the P900 perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

Review Scores

	Camera Model	camera   labs	dp review	ephoto   zine	imaging resource	photography   blog	Camera Launch	Launch Price (USD)	Street Price
	Canon G1 X Mark III	+	79/100	4.5/5	..	4.5/5	Oct 2017	1,299
	Nikon P900	..	77/100	4/5	4.5/5	4/5	Mar 2015	599
	Canon 6D Mark II	+	80/100	4.5/5	4/5	4/5	Jun 2017	1,999
	Canon 80D	+ +	84/100	4.5/5	4.5/5	4.5/5	Feb 2016	1,199
	Canon SX540	..	..	..	..	..	Jan 2016	399
	Fujifilm X100V	+ +	86/100	5/5	..	4.5/5	Feb 2020	1,399
	Fujifilm X-T3	+ +	88/100	5/5	5/5	5/5	Sep 2018	1,499
	Fujifilm X100F	+	83/100	4.5/5	..	4.5/5	Jan 2017	1,299
	Nikon P950	..	..	4/5	..	4/5	Jan 2020	799
	Nikon P1000	+	73/100	3.5/5	4.5/5	3.5/5	Jul 2018	999
	Nikon D7500	+ +	86/100	5/5	4.5/5	4.5/5	Apr 2017	1,299
	Nikon B700	+	..	4/5	..	4/5	Feb 2016	499
	Nikon B500	+	..	4/5	..	3.5/5	Jan 2016	299
	Nikon L840	+ +	..	3.5/5	..	4/5	Feb 2015	299
	Sony A6300	+	85/100	5/5	5/5	5/5	Feb 2016	999
	Sony A6500	+ +	85/100	4.5/5	5/5	4.5/5	Oct 2016	1,399
	Sony RX10 III	+	84/100	4.5/5	4.5/5	4.5/5	Mar 2016	1,499
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Camera Model
Canon G1 X Mark III
Nikon P900
Canon 6D Mark II
Canon 80D
Canon SX540
Fujifilm X100V
Fujifilm X-T3
Fujifilm X100F
Nikon P950
Nikon P1000
Nikon D7500
Nikon B700
Nikon B500
Nikon L840
Sony A6300
Sony A6500
Sony RX10 III

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

Specifications: Canon G1 X Mark III vs Nikon P900

Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

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