Compare phones
| Global Score | |
| 76.1 | 90.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11, 10 |
| 2020-06-29 | 2020-04-29 |
| 6.61 x 3.02 x 0.32 inches | 6.26 x 2.90 x 0.34 inches |
| 6.81 ounces | 6.60 ounces |
| Black | Prism cube black |
| Plastic and Plastic | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| $ 194.00 | $ 339.00 |
| 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 980 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A77 and ARM Cortex-A55, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| PowerVR GE8320 GPU | Mali-G76 MP5 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 1000 GB) external memory slot |
| 9.84 | 15.38 |
| 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 (480 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 | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4500mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.32 |
| 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
Galaxy A51 5G is better than Galaxy A21, having a 90.8 score against 76.1. Although the Galaxy A51 5G and Galaxy A21 were released with only a few months difference, Galaxy A51 5G's body is just a little thicker but also just a little bit lighter. Both of these phones include Android OS (Operating System), but Galaxy A51 5G has 11 version and Galaxy A21 has Android 10, so it gives a lot of extra features.
The Samsung Galaxy A51 5G counts with a sharper screen than Samsung Galaxy A21, and although they both have a display with the same size, the Samsung Galaxy A51 5G also has a much higher 1080 x 2400 resolution and a higher pixel count per inch in the screen. Galaxy A51 5G has a way bigger storage capacity to install applications and games or saving photos and videos than Samsung Galaxy A21, because it has 128 GB internal memory and a SD card slot that holds a maximum of 1000 GB.
The Galaxy A51 5G counts with a CPU that is just as good as the CPU in Samsung Galaxy A21, and although the Galaxy A51 5G has 3 GB more RAM, they both have 8 cores. The Galaxy A51 5G features a bit superior battery life than Galaxy A21, because it has 4500mAh of battery capacity. The Galaxy A51 5G features a very superior camera than Samsung Galaxy A21, because although it has a tinier aperture which is not good for taking pictures or videos in low light environments, it also counts with a much better 3840x2160 (4K) video quality, a back facing camera with a much better 48 mega-pixels resolution and a lot larger sensor capturing much higher quality photographs.
Samsung Galaxy A51 5G costs a lot more money than Samsung Galaxy A21, but you can get a better phone for that few extra dollars.
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