Compare phones
| Global Score | |
| 84.1 | 83.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | -- |
| 2020-03-23 | 2018-03-16 |
| 6.26 x 2.96 x 0.35 inches | 5.81 x 2.70 x 0.33 inches |
| 6.63 ounces | 5.75 ounces |
| Midnight blue and Raven black | Burgundy red, Coral blue, Ice blue, Lilac purple, Midnight black, Sunrise gold and Titanium gray |
| Plastic and Plastic | Aluminum and Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 158.00 |
| Display / Screen | |
| 6.4 inches | 5.8 inches |
| 2340 x 1080 pixels | 2960 x 1440 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 568 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.9 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Adreno 630 GPU |
| 9.27 | 9.54 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 400 GB) external memory slot |
| 11.74 | 11.34 |
| Camera | |
| 48.00 MP + 20.00 MP | 12.00 MP + 8.00 MP |
| f/2.00 aperture | f/1.50 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.39 inches (1/2.55") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 11.55 | 10.23 |
| 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+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 7.52 | 4.96 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| 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
Samsung Galaxy M21 is a little bit better than Galaxy S9, with an 84.1 score against 83.3. Samsung Galaxy M21's design is notably newer, but just a little thicker and heavier than Galaxy S9. The Galaxy S9 has just a little better hardware performance than Samsung Galaxy M21. Both of them have a 4 GB RAM and the same number of cores.
The Galaxy S9 has a slightly better screen than Galaxy M21, because although it has a quite smaller screen, it also counts with a greater display density and a higher 1440 x 2960 resolution. Galaxy M21 counts with a slightly bigger memory to install games and applications than Galaxy S9, and although they both have exactly the same 64 GB internal storage capacity, the Galaxy M21 also has a SD memory slot that allows up to 512 GB.
Galaxy M21 features a much longer battery duration than Galaxy S9, because it has a 6000mAh battery size against 3000mAh. Galaxy M21 has a superior camera than Galaxy S9, because although it has lower video frame rates and a way smaller aperture which is not so good for low light images and videos, and they both have the same 3840x2160 video resolution, the Galaxy M21 also counts with a way bigger camera sensor and a much more MP back camera.
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