Compare phones
| Global Score | |
| 91.8 | 80.1 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 15 |
| 2021-01-29 | -- |
| 5.97 x 2.80 x 0.31 inches | -- |
| 6.03 ounces | -- |
| Gray, Phantom pink, Violet and White | -- |
| Aluminum and Plastic | -- |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.7 inches |
| 2400 x 1080 pixels | -- |
| Dynamic AMOLED | AMOLED |
| 424 pixels per inch | -- |
| 1300 cd/m2 brightness | 3000 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.2 | 5 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 8 GB RAM | 16 GB RAM |
| Adreno 660 GPU | Adreno 830 GPU |
| 9.63 | 6.3 |
| Storage | |
| 128 GB internal memory | 512 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 17.6 |
| Camera | |
| 12.00 MP + 10.00 MP | 200.00 MP + 32.00 MP |
| f/1.80 aperture | -- |
| 26.00mm focal length | -- |
| 0.57 inches (1/1.76") sensor | -- |
| 7680 x 4320 (24 fps) video resolution | 7680 x 4320 (30 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (1920 fps) (Full HD) slow motion video |
| 10.78 | 12.87 |
| Networks | |
| Wi-Fi | -- |
| 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 | 7.6 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 6000mAh Si - Carbon Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | 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, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy S21 is better than the Xiaomi 15 Ultra (Rumored), getting a overall score of 91.8 against 80.1. Both of these devices use Android OS (Operating System), but Galaxy S21 has the previous 11 version and Xiaomi 15 Ultra (Rumored) has Android 15. The Galaxy S21 has a way better looking screen than Xiaomi 15 Ultra (Rumored), although it has much worse brightness and a quite smaller screen.
The Xiaomi 15 Ultra (Rumored) counts with a much bigger storage to store more apps and games than Galaxy S21, because it has more internal memory capacity. Galaxy S21 features a way better performance than Xiaomi 15 Ultra (Rumored), although it has 8 GB lesser RAM memory, they both have a Octa-Core processor.
The Xiaomi 15 Ultra (Rumored) captures better photographs and videos than Galaxy S21, and although they both have the same video resolution, the Xiaomi 15 Ultra (Rumored) also has a camera with a way better 200 mega-pixels resolution and faster video frame rates. Xiaomi 15 Ultra (Rumored) has a way better battery duration than Samsung Galaxy S21, because it has 6000mAh of battery capacity.
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