Compare phones
| Global Score | |
| 98.1 | 81.3 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 14 |
| 2021-01-29 | 2024-10-29 |
| 6.50 x 2.98 x 0.35 inches | 6.35 x 2.96 x 0.33 inches |
| 8.04 ounces | 7.51 ounces |
| Phantom black and Silver | -- |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Glass |
| Scratch-Resistant Glass | -- |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.8 inches |
| 3200 x 1440 pixels | 3200 x 1440 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 516 pixels per inch |
| 1500 cd/m2 brightness | 3500 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 10.6 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Snapdragon 8 Elite SM8750-AB (3 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 12 GB RAM | 12 GB RAM |
| Adreno 660 GPU | Adreno 830 GPU |
| 9.72 | 6.21 |
| Storage | |
| 128 GB internal memory | 256 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 13.3 |
| Camera | |
| 108.00 MP + 40.00 MP | 50.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.40 aperture |
| 24.00mm focal length | 23.00mm 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 | 11.99 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G |
| Nano SIM | Nano SIM |
| 10.7 | 7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 6100mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 7.6 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.4 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass and Gyroscope |
| FM Radio | -- |
Comparison review
Galaxy S21 Ultra has a score of 98.1, which is much better than the Xiaomi 15 Pro's overall score of 81.3. Galaxy S21 Ultra is an extremely older, just a bit heavier and a little bit thicker cellphone than the Xiaomi 15 Pro. Both of these devices use Android OS (operating system), but the Galaxy S21 Ultra has the older 11 version while Xiaomi 15 Pro has Android 14.
Galaxy S21 Ultra has a much faster processing unit than Xiaomi 15 Pro. Both of them have a 12 GB RAM memory and a Octa-Core CPU. Xiaomi 15 Pro counts with a little sharper display than Galaxy S21 Ultra, and although they both have the same 1440 x 3200 resolution, the same pixels density and a screen with the same size, the Xiaomi 15 Pro also has much more brightness.
Xiaomi 15 Pro features a lot bigger memory for games and applications than Galaxy S21 Ultra, because it has more internal storage. Xiaomi 15 Pro counts with longer battery lifetime than Galaxy S21 Ultra, because it has 6100mAh of battery capacity against 5000mAh. Samsung Galaxy S21 Ultra shoots much better pictures and videos than Xiaomi 15 Pro, because although it has a much tinier camera aperture, and they both have the same 24 fps video frame rates and the same 7680x4320 video quality, the Samsung Galaxy S21 Ultra also counts with a way higher resolution back-facing camera.
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