Compare phones
| Global Score | |
| 83 | 84.1 |
| Basic Information | |
| Asus | Samsung |
| Android 11 | Android 11, 10 |
| 2021-05-13 | 2020-03-23 |
| 5.83 x 2.70 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 5.96 ounces | 6.63 ounces |
| Horizon Silver and Obsidian Black | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 3) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 5.9 inches | 6.4 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| AMOLED | Super AMOLED |
| 446 pixels per inch | 403 pixels per inch |
| 1100 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.2 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 888 SM8350 chipset | Exynos 9611 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Mali-G72 MP3 GPU |
| 9.63 | 9.27 |
| 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 | |
| 64.00 MP + 12.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.59 inches (1/1.7") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (480 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 12.65 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 10.6 | 6.7 |
| Battery Life | |
| 4000mAh Nano SIM Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.2, EDR | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy M21 has a general score of 84.1, which is a little bit better than the Asus ZenFone 8's global score of 83. Galaxy M21's construction has the same thickness than the Asus ZenFone 8, but it's somewhat heavier. Both phones we compare here come with the same Android 11 OS. Asus ZenFone 8 counts with a bit more vivid display than Galaxy M21, because although it has a little bit smaller display, it also counts with a little better amount of pixels per inch in the display, much more brightness and a little higher resolution of 1080 x 2400.
Samsung Galaxy M21 has a better storage to install games and applications than Asus ZenFone 8, because although it has just 64 GB internal storage capacity, it also counts with a SD extension slot that holds up to 512 GB. Asus ZenFone 8 has a bit faster processing unit than Samsung Galaxy M21, and although they both have 8 processing cores, the Asus ZenFone 8 also has 2 GB more RAM memory.
Galaxy M21 counts with a way better battery lifetime than Asus ZenFone 8, because it has a 6000mAh battery size against 4000mAh. Asus ZenFone 8 shoots a bit better photos and videos than Samsung Galaxy M21, because it has a bigger sensor which provides a better photo and video quality, a lot higher 7680x4320 video definition, a bigger diafragm aperture to take better low-light captures and video and a back-facing camera with much more megapixels.
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