Compare phones
| Global Score | |
| 98.1 | 84.3 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 14 |
| 2021-01-29 | 2024-07-19 |
| 6.50 x 2.98 x 0.35 inches | 6.28 x 5.64 x 0.18 inches |
| 8.04 ounces | 7.97 ounces |
| Phantom black and Silver | Black, Blue and White |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Aluminum and Glass |
| Scratch-Resistant Glass | -- |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 8 inches |
| 3200 x 1440 pixels | 2488 x 2224 pixels |
| Dynamic AMOLED | AMOLED |
| 516 pixels per inch | 417 pixels per inch |
| 1500 cd/m2 brightness | 3000 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.8 | 10 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 8 Gen 3 SM8650-AB (4 nm) chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 12 GB RAM | 12 GB RAM |
| Adreno 660 GPU | Adreno 750 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 + 16.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 24.00mm focal length | 23.00mm focal length |
| 0.75 inches (1/1.33") sensor | 0.67 inches (1/1.49") 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 | 12.54 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | 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, Dual SIM |
| 10.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5100mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 6.88 |
| 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, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Galaxy S21 Ultra has an overall score of 98.1, which is much better than Xiaomi Mi Mix Fold 4's overall score of 84.3. Both of these phones work with Android OS, but Galaxy S21 Ultra has the previous 11 version and Xiaomi Mi Mix Fold 4 has Android 14 version. Despite being the best in this comparison, Galaxy S21 Ultra's body is older, a little heavier and a lot thicker than the Xiaomi Mi Mix Fold 4.
Samsung Galaxy S21 Ultra counts with a much faster processing unit than Xiaomi Mi Mix Fold 4. They have a 12 GB RAM and a Octa-Core processing unit. The Xiaomi Mi Mix Fold 4 features a bit more vivid display than Galaxy S21 Ultra, because although it has a bit worse screen pixel density, it also counts with a lot brighter display, a little higher 2224 x 2488 resolution and a bigger screen.
The Xiaomi Mi Mix Fold 4 counts with a superior memory to store more games and applications than Samsung Galaxy S21 Ultra, because it has 256 GB internal storage. The Xiaomi Mi Mix Fold 4 counts with a bit longer battery performance than Galaxy S21 Ultra, because it has a 5100mAh battery size instead of 5000mAh.
The Samsung Galaxy S21 Ultra features a little bit better camera than Xiaomi Mi Mix Fold 4, because although it has a smaller aperture which is not recommended for shooting photographs in low light environments, and they both have the same video frame rates and the same 7680x4320 video definition, the Samsung Galaxy S21 Ultra also counts with a back facing camera with much more mega-pixels and a bigger camera sensor.
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