Compare phones
| Global Score | |
| 80.1 | 91.8 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 15 | Android 11 |
| -- | 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 | |
| 6.7 inches | 6.2 inches |
| -- | 2400 x 1080 pixels |
| AMOLED | Dynamic AMOLED |
| -- | 424 pixels per inch |
| 3000 cd/m2 brightness | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 5 | 9.2 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 16 GB RAM | 8 GB RAM |
| Adreno 830 GPU | Adreno 660 GPU |
| 6.3 | 9.63 |
| Storage | |
| 512 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 17.6 | 10.1 |
| Camera | |
| 200.00 MP + 32.00 MP | 12.00 MP + 10.00 MP |
| -- | f/1.80 aperture |
| -- | 26.00mm focal length |
| -- | 0.57 inches (1/1.76") sensor |
| 7680 x 4320 (30 fps) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (1920 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 12.87 | 10.78 |
| Networks | |
| -- | Wi-Fi |
| -- | 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 |
| 7.6 | 10.7 |
| Battery Life | |
| 6000mAh Si - Carbon Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 7.52 | 5.92 |
| Other Features | |
| Bluetooth 5.4 | Bluetooth 5.0 |
| 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 Samsung Galaxy S21 has an overall score of 91.8, which is better than the Xiaomi 15 Ultra (Rumored)'s 80.1 global score. These devices include Android OS (operating system), but Samsung Galaxy S21 has the previous 11 version while Xiaomi 15 Ultra (Rumored) has Android 15. The Samsung Galaxy S21 features a really superior performance than Xiaomi 15 Ultra (Rumored), although it has 8 GB less RAM memory, they both have a Octa-Core CPU.
Samsung Galaxy S21 has a much better display than Xiaomi 15 Ultra (Rumored), although it has a little bit smaller screen and much less brightness. The Xiaomi 15 Ultra (Rumored) captures better pictures and videos than Galaxy S21, and although they both have the same video quality, the Xiaomi 15 Ultra (Rumored) also has faster video frame rate and a lot better resolution camera in the back.
The Xiaomi 15 Ultra (Rumored) has a way bigger storage capacity to install games and applications than Galaxy S21, because it has 512 GB internal memory capacity. The Xiaomi 15 Ultra (Rumored) features a superior battery lifetime than Galaxy S21, because it has a 6000mAh battery capacity.
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