Compare phones
| Global Score | |
| 76.7 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11 | Android 11 |
| 2021-05-27 | 2021-01-29 |
| 6.23 x 2.96 x 0.33 inches | 6.50 x 2.98 x 0.35 inches |
| 6.70 ounces | 8.04 ounces |
| Moonlight White, Neptune Blue and Space Black, | Phantom black and Silver |
| Glass and Plastic | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.3 inches | 6.8 inches |
| 2340 x 1080 pixels | 3200 x 1440 pixels |
| IPS LCD | Dynamic AMOLED |
| 409 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 9.8 |
| Performance | |
| MediaTek Helio G85 MT6769Z chipset | Qualcomm Snapdragon 888 chipset |
| Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 12 GB RAM |
| Mali G52 MC2 GPU | Adreno 660 GPU |
| 9.09 | 9.72 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 10.02 | 10.1 |
| Camera | |
| 48.00 MP + 13.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.75 inches (1/1.33") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.6 | 10.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.2 | Bluetooth 5.1 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy S21 Ultra has an overall score of 98.1, which is much better than Xiaomi Redmi Note 8 2021's general score of 76.7. Although it's the best phone in our current comparison, we must note that it's also a a bit thicker and somewhat heavier phone. These phones come with the same Android 11 operating system, so you shouldn't perceive any difference regarding that.
Samsung Galaxy S21 Ultra features just a bit better processing power than Xiaomi Redmi Note 8 2021, and although they both have a Octa-Core CPU, the Samsung Galaxy S21 Ultra also has 8 GB more RAM. The Samsung Galaxy S21 Ultra has a much sharper screen than Xiaomi Redmi Note 8 2021, because it has a better 1440 x 3200 pixels resolution, a better screen pixels density and a bit larger screen.
Galaxy S21 Ultra counts with a bit bigger storage capacity for applications and games than Xiaomi Redmi Note 8 2021, because although it has no slot for external memory cards, it also counts with more internal memory. The Galaxy S21 Ultra features a very superior camera than Xiaomi Redmi Note 8 2021, and although they both have a same size camera aperture, the Galaxy S21 Ultra also has a much bigger sensor taking way higher quality videos and photographs, a camera in the back with a lot better 108 megapixels resolution and a way higher video definition.
The Samsung Galaxy S21 Ultra features superior battery life than Xiaomi Redmi Note 8 2021, because it has a 5000mAh battery capacity instead of 4000mAh.
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