Compare phones
| Global Score | |
| 98.1 | 79 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11 | Android 11, 10 |
| 2021-01-29 | 2020-04-07 |
| 6.50 x 2.98 x 0.35 inches | 6.53 x 3.02 x 0.35 inches |
| 8.04 ounces | 7.37 ounces |
| Phantom black and Silver | Aurora blue, Glacier white and Interstellar grey |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 966.00 | $ 249.00 |
| Display / Screen | |
| 6.8 inches | 6.7 inches |
| 3200 x 1440 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | IPS LCD |
| 516 pixels per inch | 393 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 8 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 720G SM7125 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Adreno 618 GPU |
| 9.72 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 11.74 |
| Camera | |
| 108.00 MP + 40.00 MP | 48.00 MP + 16.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 13.75 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy S21 Ultra is a lot better than the Xiaomi Redmi Note 9S, getting a 98.1 score against 79. Both of these phones work with the same Android 11 OS (operating system), so they should give all the same operating system features. The Galaxy S21 Ultra is a just a bit heavier cellphone than Xiaomi Redmi Note 9S, but both have the same thickness.
The Galaxy S21 Ultra has a much sharper screen than Xiaomi Redmi Note 9S, because it has a better pixel density, a higher 1440 x 3200 resolution and a quite bigger screen. Galaxy S21 Ultra counts with a little faster processing unit than Xiaomi Redmi Note 9S, and although they both have the same number of cores, the Galaxy S21 Ultra also has 8 GB more RAM.
Galaxy S21 Ultra shoots much clearer photographs and videos than Xiaomi Redmi Note 9S, and although they both have a same size aperture, the Galaxy S21 Ultra also has a lot better video resolution, a back camera with lot more megapixels and a lot bigger camera sensor which provides a way higher image and video quality.
Xiaomi Redmi Note 9S has more storage capacity for games and applications than Samsung Galaxy S21 Ultra, because although it has less internal memory capacity, it also counts with a slot for an SD memory card that holds a maximum of 512 GB. Xiaomi Redmi Note 9S counts with a battery life that is just as good as the Samsung Galaxy S21 Ultra one, although the Xiaomi Redmi Note 9S also has a 0% larger battery size.
Although Galaxy S21 Ultra is a better device, it costs a lot more money than the Xiaomi Redmi Note 9S, and it doesn't have such a good relation between it's price and quality as Xiaomi Redmi Note 9S. If you are trying to save some money, you can buy the Xiaomi Redmi Note 9S, giving up a couple features, but you will get the most out of your savings.
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