Compare phones
| Global Score | |
| 72.6 | 84.1 |
| Basic Information | |
| Asus | Samsung |
| Android 12 | Android 11, 10 |
| 2022-07-28 | 2020-03-23 |
| 5.77 x 2.68 x 0.36 inches | 6.26 x 2.96 x 0.35 inches |
| 5.96 ounces | 6.63 ounces |
| -- | Midnight blue and Raven black |
| -- | 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 |
| Super AMOLED | Super AMOLED |
| 446 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.7 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 8+ Gen1 SM8475 (4 nm) chipset | Exynos 9611 chipset |
| processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 730 GPU | Mali-G72 MP3 GPU |
| 6.21 | 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 | |
| 50.00 MP + 12.00 MP | 48.00 MP + 20.00 MP |
| f/1.90 aperture | f/2.00 aperture |
| 14.40mm focal length | 26.00mm focal length |
| 0.64 inches (1/1.56") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 12.43 | 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 | Nano SIM, Dual SIM |
| 10.6 | 6.7 |
| Battery Life | |
| 4300mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.16 | 7.52 |
| Other Features | |
| Bluetooth 5.2 | 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
Galaxy M21 is much better than Asus Zenfone 9, getting a score of 84.1 against 72.6. Galaxy M21's design is a bit thinner than Asus Zenfone 9, although it's somewhat heavier and was released 2 years before. Both of these phones come with Android OS, but the Galaxy M21 has an older 11 version while Asus Zenfone 9 has Android 12.
The Samsung Galaxy M21 features a way better processing power than Asus Zenfone 9, although it has a smaller amount of RAM memory, they both have 8 CPU cores. The Samsung Galaxy M21 has a little bit better looking screen than Asus Zenfone 9, because although it has a little lower resolution of 1080 x 2340px and a little less pixels per inch in the display, it also counts with a little bigger display.
The Galaxy M21 features a bigger storage for applications, games, photos and videos than Asus Zenfone 9, because although it has just 64 GB internal memory capacity, it also counts with a SD extension slot that holds a maximum of 512 GB. The Samsung Galaxy M21 has a much better battery performance than Asus Zenfone 9, because it has a 6000mAh battery capacity.
The Asus Zenfone 9 shoots clearer pictures and videos than Galaxy M21, because it has a bigger aperture, a more MP back camera, a lot bigger back-facing camera sensor taking more light and vivid colors and a much higher 7680x4320 video resolution.
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