Compare phones
| Global Score | |
| 91.8 | 78.9 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10, 9.0 Pie, 8.1 Oreo |
| 2021-01-29 | 2019-02-05 |
| 5.97 x 2.80 x 0.31 inches | 6.16 x 2.93 x 0.35 inches |
| 6.03 ounces | 6.56 ounces |
| Gray, Phantom pink, Violet and White | Charcoal black and Ocean blue |
| Aluminum and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.3 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | IPS LCD |
| 424 pixels per inch | 409 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Samsung Exynos 7 Octa 7904 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1800 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Mali-G71 MP2 GPU |
| 9.63 | 8.91 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 11.74 |
| Camera | |
| 12.00 MP + 10.00 MP | 13.00 MP + 8.00 MP |
| f/1.80 aperture | f/1.90 aperture |
| 26.00mm focal length | 12.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.32 inches (1/3.1") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 10.78 | 9.02 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, 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 |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy S21 is better than Galaxy M20, having a score of 91.8 against 78.9. The Galaxy S21 construction is newer, thinner and a little bit lighter than Galaxy M20. Both phones in this review come with Android OS, but Galaxy S21 has a more recent 11 version while Galaxy M20 has Android 10 version, providing a couple additional features.
Galaxy S21 features a much better looking display than Samsung Galaxy M20, because although it has a bit smaller display, it also counts with a little bit greater display pixel density and a bit higher resolution of 1080 x 2400 pixels. Samsung Galaxy S21 features a bit more powerful processing unit than Galaxy M20, and although they both have 8 processing cores, the Samsung Galaxy S21 also has 4 GB more RAM.
Galaxy S21 counts with a superior camera than Galaxy M20, because although it has a camera with a lower 12 megapixels resolution, it also counts with a way larger back-facing camera sensor capturing more light and vivid colors, a larger aperture to take better low-light images and video and a lot better 7680x4320 video definition.
The Samsung Galaxy M20 features a quite bigger memory capacity for apps and games than Samsung Galaxy S21, because although it has just 64 GB internal storage capacity, it also counts with a SD memory slot that supports up to 512 GB. The Galaxy M20 has longer battery performance than Galaxy S21, because it has 5000mAh of battery capacity against 4000mAh.
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