Compare phones
| Global Score | |
| 91.8 | 76.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10, 8.0 Oreo |
| 2021-01-29 | 2018-06-28 |
| 5.97 x 2.80 x 0.31 inches | 6.27 x 2.98 x 0.32 inches |
| 6.03 ounces | 6.24 ounces |
| Gray, Phantom pink, Violet and White | Black, Blue, Gold and Pink |
| Aluminum and Plastic | Plastic |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6 inches |
| 2400 x 1080 pixels | 1480 x 720 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 274 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 450 SDM450 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1800 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Adreno 506 GPU |
| 9.63 | 8.91 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 256 GB) external memory slot |
| 10.1 | 10.78 |
| Camera | |
| 12.00 MP + 10.00 MP | 16.00 MP + 16.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.36 inches (1/2.8") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 10.78 | 9.46 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.3 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3500mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 5.44 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.2 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy S21 is much better than Samsung Galaxy J8, having a 91.8 score against 76.7. These devices use Android operating system, but Galaxy S21 has 11 version and Samsung Galaxy J8 has Android 10 version, counting with lots of additional features. The Galaxy S21 design is incredibly newer, just a little thinner and a little bit lighter than the Samsung Galaxy J8.
Galaxy S21 features a much better display than Samsung Galaxy J8, because it has a little bit bigger display, a much better resolution of 1080 x 2400px and a lot greater pixels density. Samsung Galaxy J8 has a little bit more storage to install applications and games than Galaxy S21, because although it has only 64 GB internal storage capacity, it also counts with a slot for an SD memory card that holds up to 256 GB.
The Galaxy S21 features a bit more powerful processing unit than Samsung Galaxy J8, and although they both have the same number of cores, the Galaxy S21 also has a higher amount of RAM memory. Galaxy S21 has a bit longer battery lifetime than Galaxy J8, because it has a 14% more battery size. Samsung Galaxy S21 captures much clearer pictures and videos than Samsung Galaxy J8, because although it has a way worse resolution camera in the back and a smaller camera aperture which is not nice for low-light photos, it also counts with a way bigger back camera sensor capturing way higher quality videos and photos and a lot higher 7680x4320 video quality.
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