Compare phones
| Global Score | |
| 98.1 | 76.7 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 12 |
| 2021-01-29 | 2022-03-23 |
| 6.50 x 2.98 x 0.35 inches | 6.46 x 3.00 x 0.32 inches |
| 8.04 ounces | 7.23 ounces |
| Phantom black and Silver | Laser Black, Laser Blue and POCO Yellow |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.7 inches |
| 3200 x 1440 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 393 pixels per inch |
| 1500 cd/m2 brightness | 1200 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 8.9 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 696 SM6375 (6 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 12 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Adreno 619 GPU |
| 9.72 | 6.12 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 1 TB) external memory slot |
| 10.1 | 15.42 |
| Camera | |
| 108.00 MP + 40.00 MP | 108.00 MP + 16.00 MP |
| f/1.80 aperture | f/1.90 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 | -- |
| 13.75 | 10.34 |
| 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 |
| 10.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5000mAh Nano SIM Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6.8 |
| 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, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Galaxy S21 Ultra has a global score of 98.1, which is much better than Xiaomi POCO X4 Pro 5G's 76.7 general score. Galaxy S21 Ultra is an older, a little bit thicker and heavier device than Xiaomi POCO X4 Pro 5G. Both phones in this review include Android OS (Operating System), but Galaxy S21 Ultra has an older 11 version while Xiaomi POCO X4 Pro 5G has Android 12 version.
Samsung Galaxy S21 Ultra counts with a brighter screen than Xiaomi POCO X4 Pro 5G, because it has a quite larger screen, a higher resolution of 1440 x 3200 pixels, a higher pixel density and a little more brightness. Galaxy S21 Ultra counts with a lot better processing power than Xiaomi POCO X4 Pro 5G, and although they both have the same number of cores, the Galaxy S21 Ultra also has a larger amount of RAM.
Samsung Galaxy S21 Ultra features a way better camera than Xiaomi POCO X4 Pro 5G, and although they both have a back facing camera with a 108 MP, the Samsung Galaxy S21 Ultra also has a bigger aperture. The Xiaomi POCO X4 Pro 5G has a much greater storage capacity for games and applications than Galaxy S21 Ultra, and although they both have the same 128 GB internal storage, the Xiaomi POCO X4 Pro 5G also has an external SD slot that supports up to 1 TB.
Xiaomi POCO X4 Pro 5G features a battery lifetime that is just as good as Samsung Galaxy S21 Ultra's battery performance.
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