Compare phones
| Global Score | |
| 72.9 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 12 | Android 11 |
| -- | 2021-01-29 |
| -- | 6.50 x 2.98 x 0.35 inches |
| -- | 8.04 ounces |
| -- | Phantom black and Silver |
| -- | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.3 inches | 6.8 inches |
| 2400 x 1080 pixels | 3200 x 1440 pixels |
| AMOLED | Dynamic AMOLED |
| 418 pixels per inch | 516 pixels per inch |
| 1100 cd/m2 brightness | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.9 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 8+ Gen 1 SM8450 (4 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 8 GB RAM | 12 GB RAM |
| Adreno 730 GPU | Adreno 660 GPU |
| 6.21 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 50.00 MP + 16.00 MP | 108.00 MP + 40.00 MP |
| -- | f/1.80 aperture |
| -- | 24.00mm focal length |
| -- | 0.75 inches (1/1.33") sensor |
| -- | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 8.47 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 10.6 | 10.7 |
| Battery Life | |
| 4500mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.32 | 6.8 |
| Other Features | |
| Bluetooth 5.2 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| 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
Galaxy S21 Ultra is way better than Xiaomi 12S, getting a 98.1 score against 72.9. Both phones in our current comparison have Android OS (operating system), but Galaxy S21 Ultra has the older 11 version while Xiaomi 12S has Android 12 version. Galaxy S21 Ultra has a lot better hardware performance than Xiaomi 12S, and although they both have a Octa-Core CPU, the Galaxy S21 Ultra also has a larger amount of RAM.
The Samsung Galaxy S21 Ultra has a more vivid display than Xiaomi 12S, because it has a little larger display, a better 1440 x 3200 pixels resolution, a quite greater screen density and more screen brightness. The Galaxy S21 Ultra captures a lot better pictures and videos than Xiaomi 12S, because it has a much better 108 MP resolution back facing camera.
The Galaxy S21 Ultra and Xiaomi 12S both count with really similar memory capacity for games and applications, both have equal 128 GB internal storage. Galaxy S21 Ultra counts with a bit better battery duration than Xiaomi 12S, because it has an 11% more battery capacity.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.