Compare phones
| Global Score | |
| 83.3 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2018-03-16 | 2020-03-23 |
| 5.81 x 2.70 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 5.75 ounces | 6.63 ounces |
| Burgundy red, Coral blue, Ice blue, Lilac purple, Midnight black, Sunrise gold and Titanium gray | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 158.00 | -- |
| 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 845 SDM845 chipset | Exynos 9611 chipset |
| Kryo 385, 64-bit, 10 nm (Octa-Core 2800 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 630 GPU | Mali-G72 MP3 GPU |
| 9.54 | 9.27 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.34 | 11.74 |
| Camera | |
| 12.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/1.50 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.39 inches (1/2.55") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 10.23 | 11.55 |
| 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 3000mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | 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
The Galaxy M21 has a score of 84.1, which is a bit better than Galaxy S9's overall score of 83.3. Galaxy M21 is a notably newer phone than the Galaxy S9, but it's a little bit thicker and heavier. Galaxy S9 counts with a bit better hardware performance than Galaxy M21. Both have the same RAM memory amount and 8 cpu cores.
Galaxy S9 counts with a little more vivid display than Samsung Galaxy M21, because although it has a little bit smaller display, it also counts with a higher pixels density and a better resolution of 1440 x 2960. Samsung Galaxy M21 shoots much better photographs and videos than Galaxy S9, because although it has lower video frame rate and a way smaller camera aperture which is not good for shooting photos and/or video in poorly lited situations, and they both have the same 3840x2160 video definition, the Samsung Galaxy M21 also counts with a way larger sensor shooting much better quality videos and pictures and a camera with lot more megapixels.
The Galaxy M21 counts with a slightly bigger memory for games and applications than Samsung Galaxy S9, and although they both have equal 64 GB internal memory, the Galaxy M21 also has a SD card slot that supports up to 512 GB. Galaxy M21 has a way better battery duration than Samsung Galaxy S9, because it has a 6000mAh battery capacity instead of 3000mAh.
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