Compare phones
| Global Score | |
| 98.1 | 88 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 11, 10 |
| 2021-01-29 | 2020-08-06 |
| 6.50 x 2.98 x 0.35 inches | 6.27 x 2.93 x 0.37 inches |
| 8.04 ounces | 7.16 ounces |
| Phantom black and Silver | Mirage black and Mirage blue |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| 3200 x 1440 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 516 pixels per inch | 405 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Samsung Exynos 9611 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Mali-G72 MP3 GPU |
| 9.72 | 9.36 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 14.14 |
| Camera | |
| 108.00 MP + 40.00 MP | 64.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | 26.00mm focal length |
| 0.75 inches (1/1.33") sensor | 0.59 inches (1/1.7") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (480 fps) (HD) slow motion video |
| 13.75 | 12.1 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 6000mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 7.52 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy S21 Ultra is much better than Samsung Galaxy M31s, getting a 98.1 score against 88. Both phones in this comparison review include the same Android 11 OS, so they should count with all the same operating system features. Galaxy S21 Ultra's body is heavier but just a little bit thinner than the Samsung Galaxy M31s, and both were released with only 6 months difference.
The Samsung Galaxy S21 Ultra features a bit faster processor than Samsung Galaxy M31s, and although they both have the same number of cores, the Samsung Galaxy S21 Ultra also has a larger amount of RAM. The Galaxy S21 Ultra counts with a much better looking screen than Samsung Galaxy M31s, because it has a better resolution of 1440 x 3200 pixels, a quite larger display and a greater display density.
The Samsung Galaxy M31s has a much better memory capacity for applications and games than Galaxy S21 Ultra, and although they both have equal internal storage, the Samsung Galaxy M31s also has an external memory slot that holds a maximum of 512 GB. Galaxy S21 Ultra counts with a better camera than Samsung Galaxy M31s, and although they both have a same size aperture, the Galaxy S21 Ultra also has a camera with a way better 108 MP resolution, a way better 7680x4320 video quality and a lot bigger sensor which gives a lot higher photo and video quality.
Samsung Galaxy M31s has better battery life than Galaxy S21 Ultra, because it has a 20 percent more battery capacity.
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