Compare phones
| Global Score | |
| 76.6 | 90.8 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10 | Android 11, 10 |
| 2020-05-20 | 2020-04-29 |
| 6.39 x 3.04 x 0.35 inches | 6.26 x 2.90 x 0.34 inches |
| 7.02 ounces | 6.60 ounces |
| Forest green, Midnight gray and Polar white | Prism cube black |
| Plastic | Aluminum and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 283.00 | $ 339.00 |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 396 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 8 | 8.1 |
| Performance | |
| MediaTek Helio G85 chipset | Samsung Exynos 980 chipset |
| Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | ARM Cortex-A77 and ARM Cortex-A55, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| Mali G52 MC2 GPU | Mali-G76 MP5 GPU |
| 9.09 | 9.27 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 1000 GB) external memory slot |
| 10.02 | 15.38 |
| Camera | |
| 48.00 MP + 13.00 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 |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (480 fps) (HD) slow motion video |
| 11 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 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 |
| 6.7 | 10.7 |
| Battery Life | |
| 5020mAh Li - Polymer Battery | 4500mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 6.32 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | 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 5G has a general score of 90.8, which is much better than Xiaomi Redmi Note 9's score of 76.6. Although the Galaxy A51 5G and Xiaomi Redmi Note 9 were released only a couple months apart, the Galaxy A51 5G is a little bit thinner and a little bit lighter. Both of these phones come with Android OS (Operating System), but Galaxy A51 5G has a more recent 11 version and Xiaomi Redmi Note 9 has Android 10, so it provides lots of additional features.
Samsung Galaxy A51 5G has a bit better looking screen than Xiaomi Redmi Note 9, and although they both have a display with the same size, the Samsung Galaxy A51 5G also has a quite higher pixel amount in each inch in the display and a slightly better resolution of 1080 x 2400. Samsung Galaxy A51 5G has a bit faster CPU than Xiaomi Redmi Note 9, and although they both have 8 cores, the Samsung Galaxy A51 5G also has more RAM memory.
Samsung Galaxy A51 5G has a much bigger memory for applications, games, photos and videos than Xiaomi Redmi Note 9, because it has 128 GB internal memory and a slot for an external memory card that admits a maximum of 1000 GB. Galaxy A51 5G takes clearer videos and photos than Xiaomi Redmi Note 9, because although it has a smaller camera aperture which is not good for shooting pictures and/or video in low light environments, and they both have a 48 mega-pixels resolution back-facing camera and a 0.5 inches back camera sensor, the Galaxy A51 5G also counts with a lot higher video quality.
The Xiaomi Redmi Note 9 has a little better battery performance than Galaxy A51 5G, because it has a 12% bigger battery size.
Galaxy A51 5G costs more money than the Xiaomi Redmi Note 9, but you can get a better phone for that extra money.
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