| Global Score | |
| 76.1 | 85.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 5.0 |
| 2020-06-29 | 2015-04-10 |
| 6.61 x 3.02 x 0.32 inches | 5.59 x 2.76 x 0.28 inches |
| 6.81 ounces | 4.66 ounces |
| Black | Black, Gold, Green and White |
| Plastic and Plastic | Aluminium and Glass |
| -- | Scratch-Resistant Glass |
| $ 194.00 | $ 950.00 |
| Display / Screen | |
| 6.5 inches | 5.1 inches |
| 1600 x 720 pixels | 1440 x 2560 pixels (Quad HD / 2K) |
| IPS LCD | Super AMOLED |
| 270 pixels per inch | 576 pixels per inch |
| No touch screen | Capacitive, Multi-touch |
| 7.3 | 9.9 |
| Performance | |
| Mediatek Helio P35 chipset | Exynos 7 Octa 7420 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | 64-bit ARM Cortex-A57 (Quad-Core 2100 MHz + Quad-Core 1500 MHz) processor |
| 3 GB RAM | 3 GB (1600 MHz) RAM |
| PowerVR GE8320 GPU | Mali-T760 MP8 (650 MHz) GPU |
| 9.27 | 10.08 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 10.1 |
| Camera | |
| 16.00 MP + 13.00 MP | 16.00 MP + 5.00 MP |
| f/1.80 aperture | f/1.90 aperture |
| -- | 28.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.38 inches (1/2.6") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (4K) video resolution |
| 9.35 | 8.47 |
| 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, HSUPA, UMTS, EDGE, GPRS and GSM |
| Nano SIM | Nano SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 2600mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 4.56 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.1 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Samsung Galaxy S6 Edge is better than the Galaxy A21, having a overall score of 85.7 against 76.1. These devices include Android OS (Operating System), but the Samsung Galaxy S6 Edge has 5.0 version while Galaxy A21 has Android 10. Samsung Galaxy S6 Edge's body is somewhat thinner and way lighter than Galaxy A21, although it was released 5 years before.
The Galaxy S6 Edge features a way better screen than Samsung Galaxy A21, because although it has a really smaller screen, it also counts with a lot more pixels per inch of screen and a lot higher resolution of 2560 x 1440. The Galaxy S6 Edge has a slightly better memory capacity for apps and games than Samsung Galaxy A21, because although it has no slot for an external memory card, it also counts with 128 GB internal memory capacity.
The Galaxy S6 Edge counts with a little better hardware performance than Galaxy A21, and although they both have a Octa-Core CPU and 3 GB of RAM memory, the Galaxy S6 Edge also has a 64 bits CPU and an extra graphics co-processor. Samsung Galaxy A21 counts with a better camera than Samsung Galaxy S6 Edge, because although it has a smaller back-facing camera sensor which gives a lower photo and video quality, and they both have the same video frame rate, a same resolution back-facing camera and the same video quality, the Samsung Galaxy A21 also counts with a bigger aperture.
The Samsung Galaxy A21 counts with a way better battery lifetime than Galaxy S6 Edge, because it has a 4000mAh battery size.
Although Galaxy S6 Edge is a better device, it costs a lot more money than the Galaxy A21, and it doesn't have such a good price and quality relation as Galaxy A21. If you are trying to save some money, you can get the Galaxy A21, letting go a few features and specifications, but you'll get the most with your savings.
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