Compare phones
| Global Score | |
| 74.6 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11 |
| 2019-10-16 | 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 |
| Cosmic Purple, Moonlight White, Nebula Purple, 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 |
| $ 227.00 | $ 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 | |
| Qualcomm Snapdragon 665 SM6125 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 12 GB RAM |
| Adreno 610 GPU | Adreno 660 GPU |
| 9.09 | 9.72 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 8.12 | 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 |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.44 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G) and HSPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.1 | 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 4.2 | 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
Samsung Galaxy S21 Ultra is a lot better than the Xiaomi Redmi Note 8, having a 98.1 score against 74.6. Samsung Galaxy S21 Ultra's body is newer, but heavier and just a bit thicker than Xiaomi Redmi Note 8. These phones use Android OS (operating system), but the Samsung Galaxy S21 Ultra has a newer 11 version and Xiaomi Redmi Note 8 has Android 10 version, giving some extra features.
Galaxy S21 Ultra has a bit more powerful processing unit than Xiaomi Redmi Note 8, and although they both have a Octa-Core processor, the Galaxy S21 Ultra also has a larger amount of RAM memory. The Galaxy S21 Ultra features a much better looking screen than Xiaomi Redmi Note 8, because it has a little bit larger display, a higher 1440 x 3200 resolution and a better pixels count in each inch of display.
The Galaxy S21 Ultra counts with a greater camera than Xiaomi Redmi Note 8, and although they both have the same diafragm aperture, the Galaxy S21 Ultra also has a much better 7680x4320 video quality, a lot larger sensor taking more light and vivid colors and a much better 108 mega-pixels resolution back-facing camera.
The Galaxy S21 Ultra features a very superior storage capacity for applications and games than Xiaomi Redmi Note 8, because although it has no external SD slot, it also counts with 128 GB internal memory. The Galaxy S21 Ultra counts with superior battery duration than Xiaomi Redmi Note 8, because it has a 25 percent bigger battery capacity.
Galaxy S21 Ultra costs a lot more money than Xiaomi Redmi Note 8, but it's still a great choice, as you can get a lot more features for that extra money.
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