Compare phones
| Global Score | |
| 91.8 | 80.6 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 14 |
| 2021-01-29 | 2024-10-29 |
| 5.97 x 2.80 x 0.31 inches | 6.00 x 2.80 x 0.32 inches |
| 6.03 ounces | 6.67 ounces |
| Gray, Phantom pink, Violet and White | -- |
| Aluminum and Plastic | Glass |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.4 inches |
| 2400 x 1080 pixels | 2670 x 1200 pixels |
| Dynamic AMOLED | OLED |
| 424 pixels per inch | 457 pixels per inch |
| 1300 cd/m2 brightness | 3200 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.2 | 10.2 |
| 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 |
| 8 GB RAM | 12 GB RAM |
| Adreno 660 GPU | Adreno 830 GPU |
| 9.63 | 6.21 |
| Storage | |
| 128 GB internal memory | 256 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 13.3 |
| Camera | |
| 12.00 MP + 10.00 MP | 50.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.60 aperture |
| 26.00mm focal length | 23.00mm 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 (960 fps) (Full HD) slow motion video |
| 10.78 | 12.1 |
| 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 | |
| 4000mAh Li - Polymer Battery | 5400mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.92 | 7.12 |
| 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 and Gyroscope |
| FM Radio | -- |
Comparison review
Samsung Galaxy S21 has an overall score of 91.8, which is better than the Xiaomi 15's 80.6 score. Both of these phones include Android operating system, but the Samsung Galaxy S21 has an older 11 version and Xiaomi 15 has Android 14 version. The Samsung Galaxy S21 is an way older phone than Xiaomi 15, but Samsung was able to build it a little bit lighter and a little bit thinner anyway.
The Galaxy S21 features a very superior processing unit than Xiaomi 15, although it has 4 GB lesser RAM memory, they both have a Octa-Core CPU. Xiaomi 15 has a sharper display than Galaxy S21, because it has a slightly better resolution of 1200 x 2670, a way brighter screen, a bit higher screen pixel density and a little bit bigger screen.
The Xiaomi 15 has a way bigger storage capacity for applications and games than Galaxy S21, because it has 128 GB more internal memory capacity. Xiaomi 15 captures much clearer videos and photos than Samsung Galaxy S21, and although they both have the same 7680x4320 video definition, the Xiaomi 15 also has a much higher resolution camera in the back, faster video frame rates and a larger aperture to take better photography and videos in low-light situations.
The Xiaomi 15 has a really longer battery performance than Galaxy S21, because it has a 35% more battery capacity.
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