Compare phones
| Global Score | |
| 80.6 | 91.8 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 14 | Android 11 |
| 2024-10-29 | 2021-01-29 |
| 6.00 x 2.80 x 0.32 inches | 5.97 x 2.80 x 0.31 inches |
| 6.67 ounces | 6.03 ounces |
| -- | Gray, Phantom pink, Violet and White |
| Glass | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 722.00 |
| Display / Screen | |
| 6.4 inches | 6.2 inches |
| 2670 x 1200 pixels | 2400 x 1080 pixels |
| OLED | Dynamic AMOLED |
| 457 pixels per inch | 424 pixels per inch |
| 3200 cd/m2 brightness | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 10.2 | 9.2 |
| Performance | |
| Snapdragon 8 Elite SM8750-AB (3 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 830 GPU | Adreno 660 GPU |
| 6.21 | 9.63 |
| Storage | |
| 256 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 13.3 | 10.1 |
| Camera | |
| 50.00 MP + 32.00 MP | 12.00 MP + 10.00 MP |
| f/1.60 aperture | f/1.80 aperture |
| 23.00mm focal length | 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 (960 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 12.1 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 7 | 10.7 |
| Battery Life | |
| 5400mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 7.12 | 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 and Gyroscope | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy S21 is much better than Xiaomi 15, getting a global score of 91.8 against 80.6. The Galaxy S21 body is just a little lighter and a little thinner than the Xiaomi 15, despite of the fact that it was released many years before. Both of these phones come with Android OS (Operating System), but the Galaxy S21 has the older 11 version while Xiaomi 15 has Android 14.
Galaxy S21 features an extremely better processor than Xiaomi 15, although it has 4 GB less RAM, they both have 8 CPU cores. The Xiaomi 15 features a much better screen than Galaxy S21, because it has a slightly higher 1200 x 2670 resolution, a quite larger screen, a just a little better pixel quantity in each screen inch and much more brightness.
The Xiaomi 15 has a lot bigger storage capacity to store more games and applications than Galaxy S21, because it has 256 GB internal memory capacity. Xiaomi 15 features a much better camera than Samsung Galaxy S21, and although they both have the same video definition, the Xiaomi 15 also has a much more MP camera in the back, a bigger camera aperture to take better photography and video in poorly lited situations and better video frame rates.
The Xiaomi 15 features a way better battery performance than Galaxy S21, because it has a 35 percent more battery size.
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