Compare phones
| Global Score | |
| 98.1 | 77.8 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11 |
| 2021-01-29 | 2022-03-15 |
| 6.50 x 2.98 x 0.35 inches | 6.01 x 2.75 x 0.32 inches |
| 8.04 ounces | 6.21 ounces |
| Phantom black and Silver | Blue, Grey and Purple |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Aluminum and Glass |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.3 inches |
| 3200 x 1440 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 418 pixels per inch |
| 1500 cd/m2 brightness | 1100 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 8.9 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 870 SM8250-AC (7 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 660 GPU | Adreno 650 GPU |
| 9.72 | 6.21 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 108.00 MP + 40.00 MP | 50.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.90 aperture |
| 24.00mm focal length | 50.00mm focal length |
| 0.75 inches (1/1.33") sensor | -- |
| 7680 x 4320 (24 fps) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (960 fps) (Full HD) slow motion video |
| 13.75 | 11.88 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4500mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6.32 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy S21 Ultra has a score of 98.1, which is way better than the Xiaomi 12X's 77.8 score. Even being the best phone in this review, we must tell that it's also older, noticeably heavier and just a little thicker. Both of these phones use the same Android 11 operating system, so they should offer very similar operating system features.
Galaxy S21 Ultra has a better screen than Xiaomi 12X, because it has more brightness, a bit better pixel quantity per inch of display, a better resolution of 1440 x 3200 pixels and a quite bigger screen. The Xiaomi 12X counts with as much storage capacity for games and applications as Galaxy S21 Ultra, they have the same internal memory capacity.
Galaxy S21 Ultra features a really superior processing power than Xiaomi 12X, 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 counts with a better camera than Xiaomi 12X, and although they both have the same 24 fps video frame rate and the same 7680x4320 video quality, the Galaxy S21 Ultra also has a bigger camera aperture and a much better resolution back-facing camera.
The Samsung Galaxy S21 Ultra counts with a little better battery life than Xiaomi 12X, because it has an 11 percent bigger battery size.
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