Compare phones
| Global Score | |
| 98.1 | 88.9 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 10 |
| 2021-01-29 | 2019-09-24 |
| 6.50 x 2.98 x 0.35 inches | 6.08 x 2.85 x 0.41 inches |
| 8.04 ounces | 8.50 ounces |
| Phantom black and Silver | Black |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Titanium |
| Scratch-Resistant Glass | -- |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 7.9 inches |
| 3200 x 1440 pixels | 2250 x 2088 pixels |
| Dynamic AMOLED | OLED |
| 516 pixels per inch | 389 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 8.2 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 855+ SM8150-AC chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2960 MHz) processor |
| 12 GB RAM | 12 GB RAM |
| Adreno 660 GPU | Adreno 640 GPU |
| 9.72 | 9.81 |
| Storage | |
| 128 GB internal memory | 512 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 17.6 |
| Camera | |
| 108.00 MP + 40.00 MP | 108.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | 0.75 inches (1/1.33") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 13.75 | 10.56 |
| 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 | 4050mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| 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 better than the Xiaomi Mi Mix Alpha, having a global score of 98.1 against 88.9. Galaxy S21 Ultra is a newer phone, and it's also a little lighter and thinner than Xiaomi Mi Mix Alpha. Both phones in this comparison review come with Android operating system, but the Galaxy S21 Ultra has newer 11 version while Xiaomi Mi Mix Alpha has Android 10 version, providing the user some nice extra features and performance enhancements.
The Xiaomi Mi Mix Alpha counts with a little better processing power than Galaxy S21 Ultra. Both have 12 GB of RAM memory and a Octa-Core processor. The Samsung Galaxy S21 Ultra counts with a brighter display than Xiaomi Mi Mix Alpha, because although it has a bit smaller display and a quite lower resolution of 1440 x 3200 pixels, it also counts with a greater count of pixels per inch of display.
The Galaxy S21 Ultra shoots way better photographs and videos than Xiaomi Mi Mix Alpha, because although it has a smaller diafragm aperture which is not nice for low-light captures and video, and they both have a 108 MP back facing camera and a same size sensor, the Galaxy S21 Ultra also counts with a lot better video resolution.
The Xiaomi Mi Mix Alpha counts with a lot bigger memory for games and applications than Galaxy S21 Ultra, because it has 384 GB more internal memory capacity. Samsung Galaxy S21 Ultra counts with superior battery duration than Xiaomi Mi Mix Alpha, because it has a 5000mAh battery capacity against 4050mAh.
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