Compare phones
| Global Score | |
| 84.1 | 75.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | -- |
| 2020-03-23 | 2017-01-13 |
| 6.26 x 2.96 x 0.35 inches | 6.17 x 3.06 x 0.31 inches |
| 6.63 ounces | 6.56 ounces |
| Midnight blue and Raven black | Black sky, Blue mist, Gold sand and Peach cloud |
| Plastic and Plastic | Aluminum and Glass (Corning Gorilla Glass 4) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 5.7 inches |
| 2340 x 1080 pixels | 1920 x 1080 pixels (Full HD) |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 386 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.9 |
| Performance | |
| Exynos 9611 chipset | Samsung Exynos 7 Octa 7880 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1900 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali-G72 MP3 GPU | Mali-T830 MP3 GPU |
| 9.27 | 9 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 256 GB) external memory slot |
| 11.74 | 8.88 |
| Camera | |
| 48.00 MP + 20.00 MP | 16.00 MP + 16.00 MP |
| f/2.00 aperture | f/1.90 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | -- |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 9.24 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G) and HSPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.1 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3600mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.6 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.2 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Samsung Galaxy M21 is better than the Samsung Galaxy A7 (2017), getting an 84.1 score against 75.8. Even though the Samsung Galaxy M21 is extremely newer than the Samsung Galaxy A7 (2017), it is a bit heavier and thicker. Galaxy M21 features a little more vivid display than Galaxy A7 (2017), because it has a little bit larger screen, a slightly better 1080 x 2340 resolution and a little more pixels per inch of screen.
Galaxy M21 has a bit better processing power than Samsung Galaxy A7 (2017), and although they both have a Octa-Core CPU, the Galaxy M21 also has more RAM memory. Galaxy M21 captures much clearer videos and photos than Samsung Galaxy A7 (2017), because although it has a smaller diafragm aperture, it also counts with a camera in the back with a lot higher 48 mega pixels resolution and a much higher video definition.
The Samsung Galaxy M21 features a way bigger memory capacity for applications, games, photos and videos than Samsung Galaxy A7 (2017), because it has a slot for SD memory cards that allows up to 512 GB and 32 GB more internal memory capacity. Galaxy M21 features a superior battery performance than Galaxy A7 (2017), because it has a 67 percent more battery capacity.
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