Compare phones
| Global Score | |
| 83.8 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11 |
| 2018-11-01 | 2021-01-29 |
| 6.22 x 2.94 x 0.33 inches | 6.50 x 2.98 x 0.35 inches |
| 7.69 ounces | 8.04 ounces |
| Black, Blue and Green | Phantom black and Silver |
| Aluminum and Ceramic | Aluminum and Glass (Corning Gorilla Glass Victus) |
| -- | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.4 inches | 6.8 inches |
| 2340 x 1080 pixels | 3200 x 1440 pixels |
| Super AMOLED | Dynamic AMOLED |
| 403 pixels per inch | 516 pixels per inch |
| 600 cd/m2 brightness | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.6 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 845 SDM845 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 8 GB RAM | 12 GB RAM |
| Adreno 630 GPU | Adreno 660 GPU |
| 9.63 | 9.72 |
| Storage | |
| 256 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 13.3 | 10.1 |
| Camera | |
| 12.20 MP + 24.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| 0.39 inches (1/2.55") sensor | 0.75 inches (1/1.33") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (960 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 10.34 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.3 | 10.7 |
| Battery Life | |
| 3200mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.2 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy S21 Ultra is much better than the Xiaomi Mi Mix 3, with a general score of 98.1 against 83.8. Galaxy S21 Ultra's design is incredibly newer, but a little thicker and a little heavier than the Xiaomi Mi Mix 3. The Galaxy S21 Ultra features a little faster CPU than Xiaomi Mi Mix 3, and although they both have 8 CPU cores, the Galaxy S21 Ultra also has a larger amount of RAM.
Samsung Galaxy S21 Ultra features a sharper display than Xiaomi Mi Mix 3, because it has a quite larger screen, a way brighter screen, a greater display pixel density and a higher resolution of 1440 x 3200. The Xiaomi Mi Mix 3 has a very superior storage capacity to store more games and applications than Samsung Galaxy S21 Ultra, because it has 256 GB internal memory capacity.
Galaxy S21 Ultra features a very superior camera than Xiaomi Mi Mix 3, and although they both have the same camera aperture, the Galaxy S21 Ultra also has a way better 7680x4320 video definition, a much bigger sensor and a back camera with a way better 108 MP resolution. Galaxy S21 Ultra features a very superior battery duration than Xiaomi Mi Mix 3, because it has a 56 percent larger battery size.
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