Compare phones
| Global Score | |
| 98.1 | 81 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 12 |
| 2021-01-29 | -- |
| 6.50 x 2.98 x 0.35 inches | -- |
| 8.04 ounces | -- |
| Phantom black and Silver | Black and White |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Aluminum and Ceramic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.7 inches |
| 3200 x 1440 pixels | 3200 x 1440 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 524 pixels per inch |
| 1500 cd/m2 brightness | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 9.7 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 8+ Gen 1 SM8450 (4 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 660 GPU | Adreno 730 GPU |
| 9.72 | 6.21 |
| Storage | |
| 128 GB internal memory | 256 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 13.3 |
| Camera | |
| 108.00 MP + 40.00 MP | 50.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 24.00mm focal length | 24.00mm focal length |
| 0.75 inches (1/1.33") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (1920 fps) (Full HD) slow motion video |
| 13.75 | 12.32 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM | Nano SIM |
| 10.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4800mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 6.64 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.2 |
| GPS | GPS |
| 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 | -- |
Comparison review
The Galaxy S21 Ultra is much better than Xiaomi 12S Ultra, having a score of 98.1 against 81. Both of these devices use Android OS (operating system), but the Galaxy S21 Ultra has the previous 11 version and Xiaomi 12S Ultra has Android 12 version. The Galaxy S21 Ultra counts with a much better processing power than Xiaomi 12S Ultra, and although they both have a Octa-Core processing unit, the Galaxy S21 Ultra also has a higher amount of RAM memory.
Galaxy S21 Ultra counts with a little bit better looking screen than Xiaomi 12S Ultra, because although it has a bit lower pixel density, and they both have an equal resolution of 1440 x 3200px and the same brightness, the Galaxy S21 Ultra also counts with a little bit bigger display. Xiaomi 12S Ultra counts with a lot bigger storage for applications and games than Galaxy S21 Ultra, because it has 256 GB internal memory.
Galaxy S21 Ultra takes much better photographs and videos than Xiaomi 12S Ultra, and although they both have the same 24 frames per second video frame rate and the same video quality, the Galaxy S21 Ultra also has a much bigger back-facing camera sensor capturing lot better quality videos and photographs, a back-facing camera with a much higher 108 MP resolution and a bigger diafragm aperture.
The Samsung Galaxy S21 Ultra features just a little better battery life than Xiaomi 12S Ultra, because it has 5000mAh of battery capacity instead of 4800mAh.
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