Compare phones
| Global Score | |
| 76.1 | 85.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11, 10 |
| 2020-06-29 | 2019-12-27 |
| 6.61 x 3.02 x 0.32 inches | 6.24 x 2.90 x 0.31 inches |
| 6.81 ounces | 6.07 ounces |
| Black | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Plastic and Plastic | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 194.00 | $ 282.00 |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 270 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.3 | 8.1 |
| Performance | |
| Mediatek Helio P35 chipset | Samsung Exynos 9611 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| PowerVR GE8320 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.84 | 14.14 |
| Camera | |
| 16.00 MP + 13.00 MP | 48.00 MP + 32.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.33 inches (1/3.06") 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 (240 fps) (HD) slow motion video |
| 9.35 | 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy A51 has a general score of 85.5, which is much better than the Samsung Galaxy A21's 76.1 general score. Both phones we compare here include Android OS (Operating System), but the Galaxy A51 has a more recent 11 version and Samsung Galaxy A21 has Android 10, providing a couple additional features. Although the Galaxy A51 and the Samsung Galaxy A21 were released with only 6 months difference, the Galaxy A51 is just a little bit thinner and lighter.
Galaxy A51 features a brighter display than Galaxy A21, and although they both have a same size display, the Galaxy A51 also has a greater pixel density and a way higher resolution of 1080 x 2400px. The Galaxy A51 features a much bigger storage capacity for games and applications than Samsung Galaxy A21, and although they both have a SD memory slot that allows up to 512 GB, the Galaxy A51 also has 96 GB more internal storage.
Galaxy A51's processing unit is very similar to the Galaxy A21 one, and although the Galaxy A51 has a higher amount of RAM, they both have a Octa-Core CPU. Galaxy A51's battery performance is just as good as Samsung Galaxy A21's battery life. Galaxy A51 features a lot better camera than Galaxy A21, because although it has a tinier aperture which is worse for low light photos and videos, it also counts with a way larger back-facing camera sensor capturing much higher quality photographs, a way higher resolution back-facing camera and a lot higher video resolution.
The Samsung Galaxy A51 is a lot more expensive than the Galaxy A21, but it's still a convenient choice, as you can get a better phone for that extra money.
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