Compare phones
| Global Score | |
| 81.9 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2017-08-11 | 2020-03-23 |
| 5.99 x 2.95 x 0.39 inches | 6.26 x 2.96 x 0.35 inches |
| 7.34 ounces | 6.63 ounces |
| Gold and Gray | Midnight blue and Raven black |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 245.00 | -- |
| Display / Screen | |
| 5.8 inches | 6.4 inches |
| 2960 x 1440 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 568 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.9 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 835 MSM8998 chipset | Exynos 9611 chipset |
| Kryo 280, 64-bit, 10 nm (Octa-Core 2350 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Adreno 540 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.78 | 11.74 |
| Camera | |
| 12.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.39 inches (1/2.55") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.79 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.6 | 6.7 |
| Battery Life | |
| 4000mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.1, EDR | 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 |
Comparison review
Samsung Galaxy M21 is just a bit better than Samsung Galaxy S8 Active, getting a score of 84.1 against 81.9. The Samsung Galaxy M21 body is way newer, a little lighter and somewhat thinner than the Samsung Galaxy S8 Active. Galaxy M21 has a processing unit that is just as good as the Galaxy S8 Active one, both have a 4 GB RAM and the same number of cores.
The Samsung Galaxy S8 Active has a slightly better looking screen than Samsung Galaxy M21, because although it has a quite smaller display, it also counts with a higher pixel number in each inch in the display and a better resolution of 1440 x 2960. Samsung Galaxy M21 has a much better camera than Samsung Galaxy S8 Active, because although it has a tinier diafragm aperture, and they both have the same video definition and the same 30 frames per second video frame rates, the Samsung Galaxy M21 also counts with a back-facing camera with a much higher resolution and a lot larger sensor which offers a lot higher photo and video quality.
The Samsung Galaxy M21 has a little bit better memory for games and applications than Samsung Galaxy S8 Active, and although they both have exactly the same internal storage capacity, the Samsung Galaxy M21 also has a slot for external memory cards that admits up to 512 GB. Galaxy M21 features a way better battery life than Galaxy S8 Active, because it has a 50% greater battery size.
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