Compare phones
| Global Score | |
| 98.1 | 83.8 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | -- |
| 2021-01-29 | 2018-11-01 |
| 6.50 x 2.98 x 0.35 inches | 6.22 x 2.94 x 0.33 inches |
| 8.04 ounces | 7.69 ounces |
| Phantom black and Silver | Black, Blue and Green |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Aluminum and Ceramic |
| Scratch-Resistant Glass | -- |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.4 inches |
| 3200 x 1440 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 516 pixels per inch | 403 pixels per inch |
| 1500 cd/m2 brightness | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 8.6 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 660 GPU | Adreno 630 GPU |
| 9.72 | 9.63 |
| 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 | 12.20 MP + 24.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | 0.39 inches (1/2.55") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (960 fps) (Full HD) slow motion video |
| 13.75 | 10.34 |
| 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 and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.3 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 3200mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 5.2 |
| 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 | -- |
Comparison review
The Samsung Galaxy S21 Ultra is much better than Xiaomi Mi Mix 3, getting a score of 98.1 against 83.8. Samsung Galaxy S21 Ultra's design is way newer, but just a little bit thicker and just a little bit heavier than the Xiaomi Mi Mix 3. The Galaxy S21 Ultra has just a bit better performance than Xiaomi Mi Mix 3, and although they both have 8 CPU cores, the Galaxy S21 Ultra also has a greater amount of RAM.
Galaxy S21 Ultra has a much better looking screen than Xiaomi Mi Mix 3, because it has a higher amount of pixels per inch of display, a little bigger screen, way more brightness and a better resolution of 1440 x 3200px. Xiaomi Mi Mix 3 has a way bigger storage for applications and games than Galaxy S21 Ultra, because it has 128 GB more internal memory capacity.
Galaxy S21 Ultra has a much better camera than Xiaomi Mi Mix 3, and although they both have a F1.8 aperture, the Galaxy S21 Ultra also has a way better 7680x4320 video quality, a way more megapixels camera in the back and a way bigger back-facing camera sensor providing a lot better image quality.
The Samsung Galaxy S21 Ultra counts with a much better battery performance than Xiaomi Mi Mix 3, because it has 5000mAh of battery capacity.
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