Compare phones
| Global Score | |
| 84.1 | 78.8 |
| Basic Information | |
| Samsung | Microsoft |
| Android 11, 10 | Android 10 |
| 2020-03-23 | 2020-09-10 |
| 6.26 x 2.96 x 0.35 inches | 7.36 x 5.72 x 0.19 inches |
| 6.63 ounces | 8.82 ounces |
| Midnight blue and Raven black | Glacier |
| Plastic and Plastic | Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 540.00 |
| Display / Screen | |
| 6.4 inches | 8.1 inches |
| 2340 x 1080 pixels | 2700 x 1800 pixels |
| Super AMOLED | AMOLED |
| 403 pixels per inch | 401 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.2 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 855 SM8150 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 640 GPU |
| 9.27 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 MP | 11.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") 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 | -- |
| 11.55 | 8.91 |
| 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, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3577mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Samsung Galaxy M21 is just a bit better than the Microsoft Surface Duo, having a global score of 84.1 against 78.8. Both of these phones use Android operating system, but the Samsung Galaxy M21 has a newer 11 version while Microsoft Surface Duo has Android 10 version. Samsung Galaxy M21's body is incredibly lighter but way thicker than the Microsoft Surface Duo, and both of them were released with only a couple months difference.
Galaxy M21 features a little sharper screen than Microsoft Surface Duo, because although it has a really smaller screen and a lot lower resolution of 1080 x 2340, it also counts with a bit better display pixel density. The Samsung Galaxy M21 features more storage for applications, games, photos and videos than Microsoft Surface Duo, because although it has less internal storage, it also counts with a slot for an SD memory card that holds up to 512 GB.
Microsoft Surface Duo features a bit better processing unit than Galaxy M21, and although they both have 8 cores, the Microsoft Surface Duo also has a greater amount of RAM memory. The Galaxy M21 takes way better pictures and videos than Microsoft Surface Duo, because although it has slower 30 fps video frame rates, and they both have a same size diafragm aperture and the same 3840x2160 (4K) video resolution, the Galaxy M21 also counts with a lot more MP camera in the back.
The Samsung Galaxy M21 has a much better battery duration than Microsoft Surface Duo, because it has 6000mAh of battery capacity against 3577mAh.
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