Compare phones
| Global Score | |
| 81.7 | 76.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 10 |
| 2017-04-21 | 2020-06-29 |
| 5.86 x 2.68 x 0.31 inches | 6.61 x 3.02 x 0.32 inches |
| 5.47 ounces | 6.81 ounces |
| Arctic silver, Burgundy red, Coral blue, Maple gold, Midnight black, Orchid gray and Rose pink | Black |
| Aluminum and Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 173.00 | $ 194.00 |
| Display / Screen | |
| 5.8 inches | 6.5 inches |
| 2960 x 1440 pixels | 1600 x 720 pixels |
| Super AMOLED | IPS LCD |
| 568 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.9 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 835 MSM8998 chipset | Mediatek Helio P35 chipset |
| Kryo 280, 64-bit, 10 nm (Octa-Core 2350 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 540 GPU | PowerVR GE8320 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.78 | 9.84 |
| Camera | |
| 12.00 MP + 8.00 MP | 16.00 MP + 13.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.39 inches (1/2.55") sensor | 0.33 inches (1/3.06") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | -- |
| 9.79 | 9.35 |
| 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 |
| 6.7 | 6.7 |
| Battery Life | |
| 3000mAh Li - Ion Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 5.92 |
| Other Features | |
| Bluetooth 5.0, EDR | 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 |
Comparison review
The Galaxy S8 is just a bit better than the Galaxy A21, with a score of 81.7 against 76.1. Despite of the fact that the Galaxy S8 is older than Galaxy A21, it's design is a bit thinner and lighter. Galaxy S8 and Samsung Galaxy A21 both feature extremely similar processing units, and although the Samsung Galaxy A21 has less RAM, they both have the same number of cores.
Galaxy S8 features a much sharper display than Galaxy A21, because although it has a little smaller display, it also counts with a much better pixels density and a lot better resolution of 1440 x 2960. Samsung Galaxy S8 has slightly more storage for games and applications than Galaxy A21, because although it has an external memory slot that allows a maximum of 256 GB against 512 GB, it also counts with 32 GB more internal storage.
Samsung Galaxy A21 features better battery performance than Galaxy S8, because it has 4000mAh of battery capacity instead of 3000mAh. The Galaxy S8 takes a bit better photos and videos than Galaxy A21, because although it has a much worse 12 mega pixels resolution back-facing camera, it also counts with a bigger sensor which offers a higher image and video quality, a bigger aperture and a lot higher 3840x2160 (4K) video definition.
In addition to being the best phone in this comparison, Galaxy S8 is also cheaper than the Galaxy A21.
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