Compare phones
| Global Score | |
| 85.5 | 79 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 11, 10 |
| 2019-12-27 | 2020-04-07 |
| 6.24 x 2.90 x 0.31 inches | 6.53 x 3.02 x 0.35 inches |
| 6.07 ounces | 7.37 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Aurora blue, Glacier white and Interstellar grey |
| Plastic and Plastic | Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | $ 249.00 |
| Display / Screen | |
| 6.5 inches | 6.7 inches |
| 2400 x 1080 pixels | 2400 x 1080 pixels |
| Super AMOLED | IPS LCD |
| 405 pixels per inch | 393 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 8 |
| Performance | |
| Samsung Exynos 9611 chipset | Qualcomm Snapdragon 720G SM7125 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Adreno 618 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 11.74 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 16.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.55 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5020mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy A51 is a little bit better than Xiaomi Redmi Note 9S, having a general score of 85.5 against 79. Both of these devices come with the same Android 11 operating system, so you shouldn't perceive any differences in that aspect. The Galaxy A51 body is somewhat thinner and lighter than Xiaomi Redmi Note 9S, even when both of them were released with only a few months difference.
The Samsung Galaxy A51 has a bit sharper screen than Xiaomi Redmi Note 9S, because although it has a little smaller screen, and they both have exactly the same resolution of 1080 x 2400px, the Samsung Galaxy A51 also counts with a bit better screen pixel density. Galaxy A51 counts with a much greater memory capacity for games and applications than Xiaomi Redmi Note 9S, and although they both have a slot for external memory cards that allows up to 512 GB, the Galaxy A51 also has 128 GB internal storage capacity.
Xiaomi Redmi Note 9S's processor is very similar to the Galaxy A51 one, they have a 4 GB RAM and the same number of cores. The Xiaomi Redmi Note 9S has greater battery life than Samsung Galaxy A51, because it has a 5020mAh battery capacity. The Xiaomi Redmi Note 9S's camera is very similar to the camera in Samsung Galaxy A51, and although the Xiaomi Redmi Note 9S has a bigger aperture to capture better low light images and videos, they both have a same size back camera sensor, the same video quality, the same 30 fps video frame rate and the same resolution back camera.
The Galaxy A51 costs a little more money than Xiaomi Redmi Note 9S, but you can get a better phone for that extra money.
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