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Global Score
Basic Information
Android 11Android 11
6.50 x 2.98 x 0.35 inches6.40 x 2.97 x 0.31 inches
8.04 ounces7.94 ounces
Phantom black and SilverCeramic Black, Ceramic White and Shadow Gray
Aluminum and Glass (Corning Gorilla Glass Victus)Aluminum and Ceramic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00--
Display / Screen
6.8 inches6.7 inches
3200 x 1440 pixels 2400 x 1080 pixels
516 pixels per inch393 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
Qualcomm Snapdragon 888 chipsetQualcomm Snapdragon 888+ SM8350-AC chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorKryo 680 Prime, 64-bit, 5 nm (Octa-Core 3000 MHz) processor
Adreno 660 GPUAdreno 660 GPU
128 GB internal memory128 GB internal memory
No SD card slotNo SD card slot
108.00 MP + 40.00 MP108.00 MP + 20.00 MP
f/1.80 aperturef/1.90 aperture
24.00mm focal length24.00mm focal length
0.75 inches (1/1.33") sensor0.75 inches (1/1.33") sensor
7680 x 4320 (24 fps) video resolution7680 x 4320 (24 fps) video resolution
1280 x 720 (960 fps) (HD) slow motion video1920 x 1080 (480 fps) (Full HD) slow motion video
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA
Nano SIMNano SIM, Dual SIM
Battery Life
5000mAh Li - Polymer Battery4500mAh Li - Ion Battery
Non-Removable BatteryNon-Removable Battery
Wireless ChargingWireless Charging
Other Features
Bluetooth 5.1 Bluetooth 5.2
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, 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 11.67 score against 10.59. 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.