Compare phones
| Global Score | |
| 75.8 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2017-01-13 | 2020-03-23 |
| 6.17 x 3.06 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 6.56 ounces | 6.63 ounces |
| Black sky, Blue mist, Gold sand and Peach cloud | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 4) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.7 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 386 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.9 | 8.4 |
| Performance | |
| Samsung Exynos 7 Octa 7880 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1900 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Mali-T830 MP3 GPU | Mali-G72 MP3 GPU |
| 9 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.88 | 11.74 |
| Camera | |
| 16.00 MP + 16.00 MP | 48.00 MP + 20.00 MP |
| f/1.90 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.24 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G) and HSPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 3600mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy M21 is much better than the Galaxy A7 (2017), with an 84.1 score against 75.8. Even though Samsung Galaxy M21 is way newer than Galaxy A7 (2017), it is a little heavier and thicker. Galaxy M21 has a little faster processor than Galaxy A7 (2017), and although they both have a Octa-Core processor, the Galaxy M21 also has a greater amount of RAM.
The Samsung Galaxy M21 features a slightly better looking screen than Galaxy A7 (2017), because it has a bit larger screen, a just a bit greater pixel number in each inch of display and a little bit higher 1080 x 2340 resolution. The Galaxy M21 counts with a very superior storage for games and applications than Samsung Galaxy A7 (2017), because it has 64 GB internal storage capacity and an external memory slot that allows up to 512 GB.
The Galaxy M21 has a very superior battery lifetime than Galaxy A7 (2017), because it has 6000mAh of battery capacity. Samsung Galaxy M21 shoots much better pictures and videos than Galaxy A7 (2017), because although it has a tinier diafragm aperture which is not favorable for shooting photos in low light situations, it also counts with a way higher 3840x2160 video resolution and a much more mega pixels camera in the back.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.