| Global Score | |
| 73.2 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 4.3 | Android 11, 10 |
| 0000-00-00 | 2020-03-23 |
| 5.95 x 3.13 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 5.43 ounces | 6.63 ounces |
| Brown | Midnight blue and Raven black |
| -- | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 95.00 | -- |
| Display / Screen | |
| 5.7 inches | 6.4 inches |
| 1080 x 1920 pixels (Full HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 386 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| Capacitive, Multi-touch | No touch screen |
| 8.9 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 800 chipset | Exynos 9611 chipset |
| Krait 400 (Quad-Core 2300 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Adreno 330 (450 MHz) GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSD, microSDHC, microSDXC (up to 64 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 7.56 | 11.74 |
| Camera | |
| 13.00 MP + 2.00 MP | 48.00 MP + 20.00 MP |
| -- | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| -- | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 6.93 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| -- | Mobile Hotspot |
| LTE (4G), HSPA, HSUPA, EDGE and GPRS | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| -- | Nano SIM, Dual SIM |
| 5.9 | 6.7 |
| Battery Life | |
| 2800mAh Battery | 6000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| 370 hours standby time 16 hours talk time | -- |
| 4.8 | 7.52 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Samsung Galaxy M21 has a general score of 84.1, which is much better than Samsung Galaxy Round's 73.2 overall score. Although it's the best we are comparing here, Samsung Galaxy M21 is a somewhat thicker and somewhat heavier cellphone than Samsung Galaxy Round. These phones use Android OS (operating system), but the Samsung Galaxy M21 has the newer 11 version and Samsung Galaxy Round has Android 4.3 version.
The Samsung Galaxy M21's processing unit is very similar to the Galaxy Round one, because although the Samsung Galaxy M21 has doesn't have an additional GPU, it also counts with a greater amount of RAM and 4 more CPU cores. The Galaxy Round features a little bit better looking screen than Galaxy M21, although it has a little bit lower number of pixels per inch in the display, a little bit smaller display and a little bit lower 1920 x 1080 pixels resolution.
Samsung Galaxy M21 features a much bigger storage capacity to install games and applications than Galaxy Round, because it has a SD card slot that admits up to 512 GB and 32 GB more internal storage capacity. Galaxy M21 features a much better camera than Samsung Galaxy Round, because it has a camera in the back with a much higher resolution.
The Samsung Galaxy M21 has a really longer battery life than Galaxy Round, because it has a 114 percent more battery size.
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