Compare: Samsung Galaxy M51 (6GB RAM) vs realme X (4GB RAM)

Our Opinion

The Samsung Galaxy M51 (6GB RAM) is a much better phone than the realme X (4GB RAM), and is also significantly better value for money. What should you buy? Go for the Samsung Galaxy M51 (6GB RAM)!

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	Samsung Galaxy M51 (6GB RAM)	realme X (4GB RAM)

Buy Now	Buy	Buy
Excellence Score	63.2	37.2
Value for Money Score	82.6	67.7
Price	₹ 22,999 onwards	₹ 17,999 onwards
Launch Date (India)	Sep, 2020	Jul, 2019
Expected Launch Date	N/A	N/A
Smartphone OS	Android 10Expected update to next Android version	Android 9.0 Pie, Upgradeable to Android 10Expected update to next Android version
Touchscreen	Yes (Capacitive)	Yes (Capacitive)
Screen Size	6.7 inches	6.53 inches
Screen Resolution	1080x2340 pixels (~ 385 pixels per inch)	1080x2340 pixels (~ 395 pixels per inch)
Tall Aspect Ratio / Minimal Bezels	Yes	Yes
Scratch Resistant Display	Yes, Corning Gorilla Glass 3	Yes, Corning Gorilla Glass 5
Display Type	AMOLED	AMOLED
Screen Refresh Rate	60 HzStandard	60 HzStandard
Display Features	N/A	Eye Care Mode
Full Physical QWERTY Keypad
Processor	2.2 GHz	2.2 GHz
Processor Type	Octa Core	Octa Core
Processor Name	Qualcomm Snapdragon 730GRanked #20 in Mobile Processor Benchmarks	Qualcomm Snapdragon 710Ranked #44 in Mobile Processor Benchmarks
GPU	Adreno 618	Adreno 616
RAM	6 GB	4 GB
3G	Yes	Yes
4G	Yes	Yes
5G
VoLTE	Yes	Yes
WiFi	Yes	Yes
VoWiFi/WiFi-Calling	Yes	Yes
GPS	Yes	Yes
Bluetooth	Yes	Yes
Connecting Port	USB-C	USB-C
Primary Camera	64MP + 12MP + 5MP + 5MP	48MP + 5MP
Camera Auto-Focus	Yes	Yes
Camera Flash	Yes	Yes
HD Video Recording	Yes (4K)	Yes (4K)
Other Camera Features	64MP: f/1.8 Aperture; 26mm Focal Length; 1/1.72"; 0.8um Pixel Size; PDAF, 12MP: f/2.2 Aperture; 123-degree ultra-wide lens, 5MP: f/2.4 Aperture; Macro Camera, 5MP: f/2.4 Aperture; Depth Sensor	48MP: F/1.7 Aperture; PDAF; Sony IMX 586 Sensor; 1/2.0" Sensor Size, 5MP: F/2.4 Aperture; Depth Sensor, HDR, Super Nightscape, Chroma Boost, Portrait Mode, Video: [email protected]; [email protected]/120fps; [email protected], Gyro-EIS
Secondary Camera	32MP	16MP
Secondary Camera Features	f/2.0 aperture, 26mm Focal Length, 1/2.8" Sensor Size, 0.8um Pixel Size, HDR	Motorised Pop-up Camera, F/2.0 Aperture, 25mm Focal Length (wide), 1/3" Sensor Size, 1.0um Pixel Size, Sony IMX 471 Sensor, AI Intelligent Beauty, Portrait mode, HDR
Internal Memory	128 GB	128 GB
Expandable Memory Slot	Yes, up to 512 GB
Contacts Storage	Unlimited	Unlimited
SMS Storage	Unlimited	Unlimited
Music Player	Yes	Yes
FM Radio	Yes
Dual SIM	GSM+GSM	GSM + GSM
Thickness	9.5 mmThick	9.4 mmThick
Weight	213 gmHeavy	191 gmHeavy
Width	N/A	76.0 mmOk for one-handed use
Audio Output	3.5mm jack	3.5mm jack
Water Resistant
Battery Capacity	7000 mAh	3765 mAh
Battery Standby	N/A	N/A
Battery Standby (3G)	N/A	N/A
Battery Talktime	N/A	N/A
Battery Talktime (3G)	N/A	N/A
Fast Charging Support	Yes, 25W Fast Charging	Yes, 20W VOOC Flash Charge 3.0
Included Fast Charger	Yes, 25.0W Fast Charger	Yes, 20.0W Fast Charger
Other Battery Parameters	N/A	N/A
Fingerprint sensor	Yes	Yes
Other Features	UFS 2.1 Storage; NFC; FM Recording; Noise Filtration; Dolby Atmos	In-display Fingerprint Sensor; Noise Filtration; Dolby Atmos
2-minute Review [Positives]	Sleek, classy design - the Galaxy M51 seems identical to the Galaxy A51, with a glossy polycarbonate back design - giving it a premium look The front gets a new trendy look with a hole-punch display, similar to the Galaxy M31s The phone feels solid in the hand - the 'glasstic back' offers better grip, and it is not as slippery as other phones with a glass back The side-mounted fingerprint scanner is quick to unlock the device Punchy, vivid and massive 6.7-inch FHD+ Super AMOLED display - the display is one of the best in class panels with great colour reproduction and viewing angles It also comes with "Widevine L1" certification, which helps stream content in crisp HD resolution Blacks are deep on the AMOLED display, which looks good with Dark mode enabled Samsung's OneUI is today one of the more clean, refined Android UIs that's especially well optimized for large displays like this one One UI also brings in other useful stuff, like a System-wide Dark mode (which turns the background completely black and looks great on the M51's AMOLED display), and Always On Display option Very good performance from the Snapdragon 730G - the chipset and Samsung’s OneUI optimization could take anything that you throw at it, switching across apps, moving across the UI, multitasking, and opening multiple Chrome tabs, social media is a breeze - heavy games like Call of Duty run smoothly without any lag Samsung has fixed the only major drawback it had in other M-series phones with average performance, and this time the Galaxy M51 has no issue taking on the competition in performance Good quad rear camera setup - 64MP main sensor + 12MP wide-angle lens + 5MP depth sensor + a 5MP macro camera - the Galaxy M51 carries the same camera setup as seen on the Galaxy M31s Shots taken with the primary camera during daylight are quite satisfactory, images are detailed, especially the 64MP shots, and they showcase the good dynamic range The ultra-wide sensor, like on any mid-range phone, is a good addition - it takes social media-worthy images in great lighting conditions (in low-light, the quality dips and pictures look grainy and noisy, wide-angle shots also have barrel distortion at the edges) Photos taken in low-light looks good - switching to Night mode helps reduce grain in the output and further improves image quality Live Focus shots are quite impeccable and the camera app does give you the option to set the level of blur before taking a shot - edge detection is very good and the Galaxy M31 does a good job of separating the subject from the background The macro camera takes decent shots outdoors (though, the quality dips when indoors and the output is restricted to 5MP in resolution) The single take is a nice addition from the more expensive S20 series, it lets you capture multiple formats at once The 32MP selfie camera is quite good and takes detailed selfies (though in low light, the quality goes down a notch and results are grainy) Overall, the cameras on the M51s are good for the price bracket, even though they are not the best Mammoth, out of this world 7000mAh battery delivers an incredible 2-3 days of heavy usage easily, making the Galaxy M51 the largest battery life smartphones currently available Supports 25W fast charging - the phone takes around 2 hours to charge the battery completely, which is decent The Galaxy M51 brings very good value as its big battery, powerful cameras, and expansive display all help make a solid argument in the device's favour - the phone's Snapdragon 730G SoC also ensures that M51 offers enough in terms of raw power to help it tackle most things you throw at it	Beautiful, 'shimmering' rear (plastic) panel, and a modern, notch-less 6.5-inch OLED screen - easily one of the best looking phones in this price bracket The notch-less display spans almost edge to edge, with a pop-up selfie camera mechanism (which is quite something to have, in this price bracket) Fairly fast in-display fingerprint reader The pop-up camera on the Realme X has a very quick ejection and retraction mechanism, which makes face recognition work pretty seamlessly too Very good 6.5-inch OLED screen - colors are lively, with deep blacks The lack of a notch really helps make the screen appear immersive, and consuming content on the screen is a pleasure ColorOS UI is now much more streamlined than before - there’s also now an app drawer, and a useful shortcut menu accessed by swiping from the sides The gesture navigation is nice and intuitive too Thankfully, it's not ad-strewn either, like some of the recent phones from Xiaomi Very good performance backed by the powerful Snapdragon 710 chipset - everything from daily use to high-end games is smooth GPU performance is an especially strong point of the Snapdragon 710, so if you are into gaming, the phone tends to comfortably outperform rivals Very good set of dual rear cameras (48MP+5MP) and front camera (16MP) Good overall image quality in daylight, and fairly good quality in low-light as well Night mode is pretty effective too Very good portraits Pretty great selfies too, from the 16MP front camera Realme’s EIS does a solid job of stabilization during videos at up to 1080p/30fps Support for 4K video recording (without EIS though) Overall, the Realme X is among the best camera setups of this price bracket, comparable to the excellent cameras on the Redmi Note 7 Pro and the Realme 3 Pro The Dolby Atmos-boosted speaker sounds pretty rich and gets fairly loud Good battery life with a 3750 mAh cell - you will comfortably get a day of use, even with heavy usage The class-leading VOOC fast-charging nicely complements the long battery life - it fills a completely depleted battery in 1:18h and it's at the 50% mark 30 minutes into it - which are some excellent numbers The Realme X looks like an incredible value package, no matter how you look at it, and will inevitably disrupt its price bracket in a big way - what you get is top-end specs, a 'full screen' AMOLED display with a pop-up selfie camera, very good performance, an excellent set of cameras, and super fast charging - you can't ask for more
2-minute Review [Negatives]	The Galaxy M51 feels hefty at 9.5mm thickness and 213g weight - it is difficult to use for a longer duration for calls, streaming, or even gaming The back of the Galaxy M51 is a fingerprint magnet - it can also get scratched easily since it is plastic The display lags with a 60 Hz display, where competing phones like OnePlus Nord offer higher 90 Hz refresh rate There's still great competition at this price and the OnePlus Nord has a lot up its sleeve with a newer processor, higher refresh rate display, and a best in class software	ColorOS still has some bloatware though, and is not quite as clean/simple as stock Android
Expert Reviews	The Samsung Galaxy M51 packs in a massive battery, Super AMOLED panel and Snapdragon chipset, although the stand out feature here is the battery, it won't disappoint you in any aspect in-depth Read Review » The Galaxy M51 has grabbed a lot of attention because of its big 7,000mAh battery, and it really does deliver very good battery life in-depth Read Review » Monstrous battery life, great display in-depth Read Review » A satisfying phone in-depth Read Review » The massive battery on the Galaxy M51 is a sure-shot advantage and other great features include a beautiful display, modern design, reliable cameras and decent performance in-depth Read Review » An all-round mid-range phone that M-series needed in-depth Read Review » Its got all the battery you need in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » hands-on Read Review »	A mature, well-rounded smartphone with few flaws and plenty to like about it...easily recommended in-depth Read Review » Great value in-depth Read Review » It's clear that a lot of thought has been put into the the Realme X...there is very little to complain about in-depth Read Review » Affordable, value for money flagship in-depth Read Review » Value for money...A worthy Xiaomi Redmi Note 7 Pro, Samsung Galaxy M40 rival in-depth Read Review » Premium smartphones get a solid contender...hard not to recommend in-depth Read Review » Highly recommended smartphone from us in the sub-Rs 20,000 price range in-depth Read Review » A deal you simply cannot resist in-depth Read Review » At this price, you will be hard-pressed to find a better deal in-depth Read Review » Great value for money phone in-depth Read Review » Fiercely good in-depth Read Review » A safe recommendation in-depth Read Review » Flagship killer’s killer...uniquely positioned device that offers great features without many compromises in-depth Read Review » Ticks almost all the boxes..a worthy competitor in the mid-range in-depth Read Review » A beautiful smartphone that delights with its performance, imaging quality and vibrant display in-depth Read Review » hands-on Read Review » hands-on Read Review »
User Reviews	4.3 26+ reviews » 4.4 17,385+ reviews »	4.5 13,616+ reviews » 4.3 338+ reviews »
Official Website	Official Website »	Official Website »
Unofficial specs?	N/A	N/A