Compare phones
| Global Score | |
| 83 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11 |
| 2021-01-18 | 2021-01-29 |
| 6.37 x 3.04 x 0.36 inches | 6.50 x 2.98 x 0.35 inches |
| 7.02 ounces | 8.04 ounces |
| Daybreak purple and Nightfall black | Phantom black and Silver |
| Plastic | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.5 inches | 6.8 inches |
| 2340 x 1080 pixels | 3200 x 1440 pixels |
| IPS LCD | Dynamic AMOLED |
| 396 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 9.8 |
| Performance | |
| MediaTek Dimensity 800U chipset | Qualcomm Snapdragon 888 chipset |
| ARM Cortex-A76 and ARM Cortex-A55, 64-bit, 7 nm (Octa-Core 2400 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 12 GB RAM |
| Mali-G57 MC3 GPU | Adreno 660 GPU |
| 9.36 | 9.72 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 13.00 MP | 108.00 MP + 40.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.75 inches (1/1.33") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (120 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.55 | 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 | |
| 5000mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | -- |
| 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 |
Comparison review
Galaxy S21 Ultra is better than Xiaomi Redmi Note 9T, having a overall score of 98.1 against 83. Galaxy S21 Ultra's construction is a little thinner but somewhat heavier than Xiaomi Redmi Note 9T, and both were released with only a few months difference. Both phones in this comparison review use Android operating system, but Galaxy S21 Ultra has 11 version and Xiaomi Redmi Note 9T has Android 10 version.
Samsung Galaxy S21 Ultra counts with a bit better performance than Xiaomi Redmi Note 9T, and although they both have the same number of cores, the Samsung Galaxy S21 Ultra also has a greater amount of RAM. The Galaxy S21 Ultra counts with a much more vibrant screen than Xiaomi Redmi Note 9T, because it has a better resolution of 1440 x 3200, a better display density and a bit bigger screen.
Galaxy S21 Ultra shoots better photos and videos than Xiaomi Redmi Note 9T, and although they both have a F1.8 aperture, the Galaxy S21 Ultra also has a back-facing camera with way more mega-pixels, a much bigger back-facing camera sensor capturing way better quality videos and photos and a way better video quality.
Xiaomi Redmi Note 9T has more storage capacity to install applications and games than Samsung Galaxy S21 Ultra, because although it has just 64 GB internal storage, it also counts with a SD memory card expansion slot that admits up to 512 GB. The Galaxy S21 Ultra counts with a battery lifetime that is just as good as the battery lifetime in Xiaomi Redmi Note 9T.
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