Compare phones
| Global Score | |
| 76.7 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 12 | Android 11 |
| 2022-03-23 | 2021-01-29 |
| 6.46 x 3.00 x 0.32 inches | 6.50 x 2.98 x 0.35 inches |
| 7.23 ounces | 8.04 ounces |
| Laser Black, Laser Blue and POCO Yellow | Phantom black and Silver |
| -- | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.7 inches | 6.8 inches |
| 2400 x 1080 pixels | 3200 x 1440 pixels |
| AMOLED | Dynamic AMOLED |
| 393 pixels per inch | 516 pixels per inch |
| 1200 cd/m2 brightness | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.9 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 696 SM6375 (6 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 12 GB RAM |
| Adreno 619 GPU | Adreno 660 GPU |
| 6.12 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| microSDXC (up to 1 TB) external memory slot | No SD card slot |
| 15.42 | 10.1 |
| Camera | |
| 108.00 MP + 16.00 MP | 108.00 MP + 40.00 MP |
| f/1.90 aperture | 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 |
| 10.34 | 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 | |
| 5000mAh Nano SIM Battery | 5000mAh Li - Polymer 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, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy S21 Ultra is a lot better than the Xiaomi POCO X4 Pro 5G, having a 98.1 score against 76.7. Galaxy S21 Ultra is an older, somewhat heavier and just a little bit thicker cellphone than the Xiaomi POCO X4 Pro 5G. Both phones in this comparison come with Android OS (operating system), but Galaxy S21 Ultra has older 11 version and Xiaomi POCO X4 Pro 5G has Android 12 version.
Samsung Galaxy S21 Ultra features a more vivid screen than Xiaomi POCO X4 Pro 5G, because it has a little brighter display, a little bigger display, a higher pixels number in each inch of display and a higher 1440 x 3200 resolution. Xiaomi POCO X4 Pro 5G has a very superior storage capacity for applications, games, photos and videos than Galaxy S21 Ultra, and although they both have equal internal storage, the Xiaomi POCO X4 Pro 5G also has a slot for external memory cards that allows up to 1 TB.
Galaxy S21 Ultra features a lot better hardware performance than Xiaomi POCO X4 Pro 5G, and although they both have the same number of cores, the Galaxy S21 Ultra also has more RAM memory. The Galaxy S21 Ultra has a battery lifetime that's very similar to Xiaomi POCO X4 Pro 5G's battery life. Galaxy S21 Ultra takes much better videos and photos than Xiaomi POCO X4 Pro 5G, and although they both have the same resolution camera in the back, the Galaxy S21 Ultra also has a larger camera aperture for better photos in poorly lited situations.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.