| Global Score | |
| 84.1 | 85.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 5.0 |
| 2020-03-23 | 2015-04-10 |
| 6.26 x 2.96 x 0.35 inches | 5.59 x 2.76 x 0.28 inches |
| 6.63 ounces | 4.66 ounces |
| Midnight blue and Raven black | Black, Gold, Green and White |
| Plastic and Plastic | Aluminium and Glass |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 950.00 |
| Display / Screen | |
| 6.4 inches | 5.1 inches |
| 2340 x 1080 pixels | 1440 x 2560 pixels (Quad HD / 2K) |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 576 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | Capacitive, Multi-touch |
| 8.4 | 9.9 |
| Performance | |
| Exynos 9611 chipset | Exynos 7 Octa 7420 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | 64-bit ARM Cortex-A57 (Quad-Core 2100 MHz + Quad-Core 1500 MHz) processor |
| 4 GB RAM | 3 GB (1600 MHz) RAM |
| Mali-G72 MP3 GPU | Mali-T760 MP8 (650 MHz) GPU |
| 9.27 | 10.08 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 MP | 16.00 MP + 5.00 MP |
| f/2.00 aperture | f/1.90 aperture |
| 26.00mm focal length | 28.00mm focal length |
| 0.5 inches (1/2") sensor | 0.38 inches (1/2.6") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 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, Dual SIM | Nano SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 2600mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 7.52 | 4.56 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.1 |
| GPS | GPS |
| -- | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
The Galaxy S6 Edge is slightly better than Galaxy M21, with an 85.7 score against 84.1. These phones come with Android operating system, but Galaxy S6 Edge has older 5.0 version and Galaxy M21 has Android 11. The Galaxy S6 Edge is an notably older cellphone than Galaxy M21, but it is lighter and somewhat thinner anyway.
Samsung Galaxy S6 Edge has a bit more powerful processing unit than Galaxy M21, because although it has a lower amount of RAM memory, and they both have 8 processing cores, the Samsung Galaxy S6 Edge also counts with a 64-bits CPU and an additional graphics processing unit. The Samsung Galaxy S6 Edge counts with a brighter screen than Samsung Galaxy M21, because although it has a lot smaller display, it also counts with a better 2560 x 1440 resolution and a greater pixels quantity per display inch.
The Samsung Galaxy M21 features a quite bigger memory for games and applications than Galaxy S6 Edge, because although it has just 64 GB internal memory capacity, it also counts with an external memory card slot that holds up to 512 GB. Samsung Galaxy M21 has a really longer battery duration than Galaxy S6 Edge, because it has a 131 percent bigger battery size.
Samsung Galaxy M21 takes greater photos and videos than Galaxy S6 Edge, because although it has a smaller camera aperture which is not nice for low-light photos, and they both have the same video frame rates and the same (4K) video quality, the Samsung Galaxy M21 also counts with a way higher resolution back camera and a lot bigger back-facing camera sensor providing a much higher image quality.
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