| Global Score | |
| 86.6 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11 |
| 2020-05-08 | 2021-01-29 |
| 6.64 x 3.04 x 0.41 inches | 6.50 x 2.98 x 0.35 inches |
| 7.83 ounces | 8.04 ounces |
| Armor gray, Lightning black and Star silver | Phantom black and Silver |
| Aluminum and Aluminum | Aluminum and Glass (Corning Gorilla Glass Victus) |
| -- | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.7 inches | 6.8 inches |
| 2400 x 1080 pixels | 3200 x 1440 pixels |
| OLED | Dynamic AMOLED |
| 393 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 865 SM8250 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 585, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 8 GB RAM | 12 GB RAM |
| Adreno 650 GPU | Adreno 660 GPU |
| 9.63 | 9.72 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 64.00 MP + 20.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.59 inches (1/1.7") sensor | 0.75 inches (1/1.33") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 12.43 | 13.75 |
| 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), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 10.7 | 10.7 |
| Battery Life | |
| 4720mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.56 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Galaxy S21 Ultra has a general score of 98.1, which is much better than the Xiaomi Black Shark 3's general score of 86.6. Both devices in our current comparison work with Android operating system, but the Galaxy S21 Ultra has the newer 11 version while Xiaomi Black Shark 3 has Android 10 version, so it provides you a lot of extra features. Although Galaxy S21 Ultra and Xiaomi Black Shark 3 were only released with a few months difference, Galaxy S21 Ultra's design is thinner but also a little bit heavier.
The Samsung Galaxy S21 Ultra features a bit better processing unit than Xiaomi Black Shark 3, and although they both have a Octa-Core processor, the Samsung Galaxy S21 Ultra also has more RAM memory. Galaxy S21 Ultra has a lot better display than Xiaomi Black Shark 3, because it has a better resolution of 1440 x 3200 pixels, a bit bigger screen and a greater quantity of pixels per screen inch.
Samsung Galaxy S21 Ultra has a much better camera than Xiaomi Black Shark 3, and although they both have a F1.8 aperture, the Samsung Galaxy S21 Ultra also has a lot better 7680x4320 video quality, a way larger back-facing camera sensor which gives a much better image and video quality and a back facing camera with much more MP.
The Galaxy S21 Ultra features as much memory for applications, games, photos and videos as Xiaomi Black Shark 3, both have equal 128 GB internal storage. The Galaxy S21 Ultra counts with just a little bit longer battery life than Xiaomi Black Shark 3, because it has 5000mAh of battery capacity.
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