Compare phones
| Global Score | |
| 79 | 85.5 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11, 10 | Android 11, 10 |
| 2020-04-07 | 2019-12-27 |
| 6.53 x 3.02 x 0.35 inches | 6.24 x 2.90 x 0.31 inches |
| 7.37 ounces | 6.07 ounces |
| Aurora blue, Glacier white and Interstellar grey | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 249.00 | $ 282.00 |
| Display / Screen | |
| 6.7 inches | 6.5 inches |
| 2400 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 393 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 8 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 720G SM7125 chipset | Samsung Exynos 9611 chipset |
| Kryo 465, 64-bit, 8 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Adreno 618 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 14.14 |
| Camera | |
| 48.00 MP + 16.00 MP | 48.00 MP + 32.00 MP |
| f/1.80 aperture | f/2.00 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 (960 fps) (HD) slow motion video | 1280 x 720 (240 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 | |
| 5020mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 5.92 |
| 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
Galaxy A51 has a general score of 85.5, which is a bit better than Xiaomi Redmi Note 9S's 79 global score. Both of these phones include the same Android 11 OS (operating system). The Galaxy A51 design is lighter and thinner than Xiaomi Redmi Note 9S, although both of them were only released 3 months apart.
Xiaomi Redmi Note 9S and Samsung Galaxy A51 both count with quite similar CPUs, they have 4 GB of RAM and a Octa-Core processing unit. Galaxy A51 has a little bit better looking display than Xiaomi Redmi Note 9S, because although it has a quite smaller screen, and they both have the same exact resolution of 1080 x 2400px, the Galaxy A51 also counts with a little more pixels per inch in the display.
The Samsung Galaxy A51's camera is just as good as the camera in Xiaomi Redmi Note 9S, and although the Samsung Galaxy A51 has a smaller diafragm aperture, they both have the same video frame rate, a same resolution back camera, the same 3840x2160 video resolution and a 0.5 inches back-facing camera sensor.
Galaxy A51 has a superior memory to store more games and applications than Xiaomi Redmi Note 9S, and although they both have an external memory slot that admits a maximum of 512 GB, the Galaxy A51 also has 128 GB internal storage. The Xiaomi Redmi Note 9S counts with improved battery life than Galaxy A51, because it has a 26 percent more battery capacity.
The Samsung Galaxy A51 costs a little more than the Xiaomi Redmi Note 9S, but it's still a good choice, because you can get a lot more features for that extra money.
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