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Global Score
11.678.89
Basic Information
SamsungXiaomi
Android 11Android 10
2021-01-292019-10-16
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 SilverCosmic Purple, Moonlight White, Nebula Purple, Neptune Blue and Space Black
Aluminum and Glass (Corning Gorilla Glass Victus)Glass and Plastic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00$ 227.00
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 chipsetQualcomm Snapdragon 665 SM6125 chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorKryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor
12 GB RAM3 GB RAM
Adreno 660 GPUAdreno 610 GPU
9.729.09
Storage
128 GB internal memory32 GB internal memory
No SD card slotmicroSDXC (up to 128 GB) external memory slot
10.18.12
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 resolution3840 x 2160 (30 fps) (4K) video resolution
1280 x 720 (960 fps) (HD) slow motion video1280 x 720 (240 fps) (HD) slow motion video
13.7511.44
Networks
Wi-FiWi-Fi
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPALTE-A (4G), LTE (4G) and HSPA
Nano SIMNano SIM, Dual SIM
10.76.1
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 4.2
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

Galaxy S21 Ultra has an overall score of 11.67, which is way better than Xiaomi Redmi Note 8's global score of 8.89. These phones work with Android OS, but the Galaxy S21 Ultra has a newer 11 version and Xiaomi Redmi Note 8 has Android 10 version, so it provides some nice extra features. Even though Galaxy S21 Ultra is newer than Xiaomi Redmi Note 8, it is somewhat heavier and a little bit thicker.

Galaxy S21 Ultra features a lot better display than Xiaomi Redmi Note 8, because it has a little larger screen, a better resolution of 1440 x 3200px and a better quantity of pixels per inch of screen. Samsung Galaxy S21 Ultra has a much greater memory to install applications and games than Xiaomi Redmi Note 8, because although it has no external memory card slot, it also counts with 128 GB internal memory capacity.

Galaxy S21 Ultra has a little faster processing unit than Xiaomi Redmi Note 8, and although they both have the same number of cores, the Galaxy S21 Ultra also has 9 GB more RAM. The Galaxy S21 Ultra shoots greater pictures and videos than Xiaomi Redmi Note 8, and although they both have a same size diafragm aperture, the Galaxy S21 Ultra also has a way better video resolution, a lot better 108 MP resolution back camera and a lot larger back camera sensor.

The Samsung Galaxy S21 Ultra features a bit superior battery performance than Xiaomi Redmi Note 8, because it has a 25 percent greater battery capacity.

The Galaxy S21 Ultra is a lot more expensive than Xiaomi Redmi Note 8, but it's still a great deal, as you can get a lot more for that extra money.