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Global Score
11.679.15
Basic Information
SamsungXiaomi
Android 11Android 11
2021-01-292021-05-27
6.50 x 2.98 x 0.35 inches6.23 x 2.96 x 0.33 inches
8.04 ounces6.70 ounces
Phantom black and SilverMoonlight White, Neptune Blue and Space Black,
Aluminum and Glass (Corning Gorilla Glass Victus)Glass and Plastic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00--
Display / Screen
6.8 inches6.3 inches
3200 x 1440 pixels 2340 x 1080 pixels
Dynamic AMOLED IPS LCD
516 pixels per inch409 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
9.88.1
Performance
Qualcomm Snapdragon 888 chipsetMediaTek Helio G85 MT6769Z chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorCortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor
12 GB RAM4 GB RAM
Adreno 660 GPUMali G52 MC2 GPU
9.729.09
Storage
128 GB internal memory64 GB internal memory
No SD card slotmicroSDXC (up to 128 GB) external memory slot
10.110.02
Camera
108.00 MP + 40.00 MP48.00 MP + 13.00 MP
f/1.80 aperturef/1.80 aperture
24.00mm focal length--
0.75 inches (1/1.33") sensor0.5 inches (1/2") sensor
7680 x 4320 (24 fps) video resolution1920 x 1080 (30 fps) (Full HD) video resolution
1280 x 720 (960 fps) (HD) slow motion video1280 x 720 (120 fps) (HD) slow motion video
13.7511
Networks
Wi-FiWi-Fi
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPALTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA
Nano SIMNano SIM
10.76.6
Battery Life
5000mAh Li - Polymer Battery4000mAh Li - Polymer Battery
Non-Removable BatteryNon-Removable Battery
Wireless Charging--
4.964.88
Other Features
Bluetooth 5.1 Bluetooth 5.2
GPSGPS
NFC--
--Infra-red port
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor
FM Radio--

Comparison review

The Galaxy S21 Ultra has a score of 11.67, which is way better than Xiaomi Redmi Note 8 2021's general score of 9.15. These devices have the same Android 11 OS (operating system), so both of them should provide the same OS features. Even being the best we compare here, the Galaxy S21 Ultra body is just a little bit thicker and heavier than the Xiaomi Redmi Note 8 2021.

The Samsung Galaxy S21 Ultra has an incredibly better display than Xiaomi Redmi Note 8 2021, because it has a quite larger screen, a better 1440 x 3200 resolution and a higher screen pixels density. Galaxy S21 Ultra counts with a bit superior CPU than Xiaomi Redmi Note 8 2021, and although they both have 8 CPU cores, the Galaxy S21 Ultra also has more RAM.

The Samsung Galaxy S21 Ultra counts with a much better camera than Xiaomi Redmi Note 8 2021, and although they both have the same diafragm aperture, the Samsung Galaxy S21 Ultra also has a lot bigger back-facing camera sensor capturing lot better quality photos and videos, a lot better 7680x4320 video quality and a back camera with way more mega-pixels.

The Galaxy S21 Ultra features a bit more memory to store more apps and games than Xiaomi Redmi Note 8 2021, because although it has no external SD slot, it also counts with 128 GB internal memory. The Samsung Galaxy S21 Ultra has just a bit better battery duration than Xiaomi Redmi Note 8 2021, because it has a 25 percent greater battery capacity.