Compare phones
| Global Score | |
| 91.8 | 90.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 11, 10 |
| 2021-01-29 | 2020-04-29 |
| 5.97 x 2.80 x 0.31 inches | 6.26 x 2.90 x 0.34 inches |
| 6.03 ounces | 6.60 ounces |
| Gray, Phantom pink, Violet and White | Prism cube black |
| Aluminum and Plastic | Aluminum and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | $ 339.00 |
| Display / Screen | |
| 6.2 inches | 6.5 inches |
| 2400 x 1080 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 405 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Samsung Exynos 980 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | ARM Cortex-A77 and ARM Cortex-A55, 64-bit, 8 nm (Octa-Core 2200 MHz) processor |
| 8 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Mali-G76 MP5 GPU |
| 9.63 | 9.27 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 1000 GB) external memory slot |
| 10.1 | 15.38 |
| Camera | |
| 12.00 MP + 10.00 MP | 48.00 MP + 32.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1280 x 720 (480 fps) (HD) slow motion video |
| 10.78 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, 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 |
| 10.7 | 10.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4500mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 6.32 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy S21 is a bit better than the Galaxy A51 5G, getting a 91.8 score against 90.8. Both phones in our current comparison have the same Android 11 OS. Galaxy S21's construction is newer, just a little lighter and a bit thinner than the Galaxy A51 5G. Galaxy S21 counts with a bit faster processor than Galaxy A51 5G, and although they both have 8 CPU cores, the Galaxy S21 also has a higher amount of RAM.
Samsung Galaxy S21 features a more vivid screen than Galaxy A51 5G, because although it has a little bit smaller display, and they both have the same resolution of 1080 x 2400 pixels, the Samsung Galaxy S21 also counts with a bit greater pixel density. Samsung Galaxy A51 5G counts with a bit better camera than Samsung Galaxy S21, because although it has a tinier aperture which is not recommended for low-light photos and videos and a smaller sensor, and they both have the same 3840x2160 video quality, the Samsung Galaxy A51 5G also counts with better video frame rates and a back-facing camera with a way better 48 MP resolution.
The Galaxy A51 5G features a much greater storage for applications, games, photos and videos than Samsung Galaxy S21, and although they both have exactly the same 128 GB internal memory capacity, the Galaxy A51 5G also has a slot for an SD memory card that holds a maximum of 1000 GB. Samsung Galaxy A51 5G counts with a bit superior battery life than Samsung Galaxy S21, because it has a 13 percent more battery capacity.
Although Galaxy S21 is a better device, it is a lot more expensive than Samsung Galaxy A51 5G, and it doesn't have such a good quality/price relation as the Samsung Galaxy A51 5G. So if you want that extra specs, you can buy Galaxy S21, but if you don't you can save some dollars and get the Samsung Galaxy A51 5G, resigning some specifications.
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