Compare phones
| Global Score | |
| 98.1 | 89 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11 |
| 2021-01-29 | 2021-08-10 |
| 6.50 x 2.98 x 0.35 inches | 6.40 x 2.97 x 0.31 inches |
| 8.04 ounces | 7.94 ounces |
| Phantom black and Silver | Ceramic Black, Ceramic White and Shadow Gray |
| 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 | 2400 x 1080 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 393 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 888+ SM8350-AC chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 680 Prime, 64-bit, 5 nm (Octa-Core 3000 MHz) processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 660 GPU | Adreno 660 GPU |
| 9.72 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 108.00 MP + 40.00 MP | 108.00 MP + 20.00 MP |
| f/1.80 aperture | f/1.90 aperture |
| 24.00mm focal length | 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 | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (480 fps) (Full HD) slow motion video |
| 13.75 | 13.75 |
| 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, Dual SIM |
| 10.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4500mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 6.32 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.2 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Samsung Galaxy S21 Ultra is better than Xiaomi Mi Mix 4, having a 98.1 score against 89. Both of these phones include the same Android 11 operating system, so you shouldn't perceive any difference regarding operating system features. Although it's the best we are comparing here, the Samsung Galaxy S21 Ultra is a thicker and a little bit heavier phone than Xiaomi Mi Mix 4.
The Galaxy S21 Ultra and the Xiaomi Mi Mix 4 both count with incredibly similar processing units, and although the Xiaomi Mi Mix 4 has less RAM memory, they both have 8 processing cores. Galaxy S21 Ultra counts with a much more vibrant display than Xiaomi Mi Mix 4, because it has a higher 1440 x 3200px resolution, a bit larger screen and a greater screen pixel density.
Xiaomi Mi Mix 4 has a camera that's very similar to the Samsung Galaxy S21 Ultra one, and although the Xiaomi Mi Mix 4 has a smaller aperture which is not so good for low light photography and videos, they both have the same 24 frames per second video frame rates, the same 7680x4320 video resolution, a same size back-facing camera sensor and the same resolution back-facing camera.
Xiaomi Mi Mix 4 and Samsung Galaxy S21 Ultra count with similar storage to store more games and applications, they have exactly the same internal memory capacity. The Samsung Galaxy S21 Ultra features just a little bit longer battery duration than Xiaomi Mi Mix 4, because it has an 11% larger battery capacity.
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