Compare phones
| Global Score | |
| 73.3 | 84.1 |
| Basic Information | |
| Asus | Samsung |
| Android 6.0 Marshmallow | Android 11, 10 |
| 2016-07-12 | 2020-03-23 |
| 7.34 x 3.70 x 0.27 inches | 6.26 x 2.96 x 0.35 inches |
| 8.22 ounces | 6.63 ounces |
| Gold, Gray, Pink and Silver | Midnight blue and Raven black |
| Aluminum | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.8 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 324 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.6 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 652 8976 chipset | Exynos 9611 chipset |
| ARM Cortex-A72 and ARM Cortex-A53, 64-bit (Octa-Core 1800 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Adreno 510 GPU | Mali-G72 MP3 GPU |
| 8.91 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 200 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 12.86 | 11.74 |
| Camera | |
| 23.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 3840 x 2160 (24 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (30 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 10.01 | 11.55 |
| 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4600mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.48 | 7.52 |
| Other Features | |
| Bluetooth 4.2, EDR | Bluetooth 5.0 |
| GPS | GPS |
| 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 has an overall score of 84.1, which is better than Asus ZenFone 3 Ultra's general score of 73.3. Both devices in our current comparison include Android OS (Operating System), but Galaxy M21 has the previous 11 version while Asus ZenFone 3 Ultra has Android 6.0 Marshmallow version. The Galaxy M21 body is way newer and somewhat lighter than the Asus ZenFone 3 Ultra's, although it's noticeably thicker.
Galaxy M21 counts with a better screen than Asus ZenFone 3 Ultra, because although it has a quite smaller screen, it also counts with a slightly higher resolution of 1080 x 2340 and a just a little better quantity of pixels per screen inch. The Galaxy M21 counts with a little better processing power than Asus ZenFone 3 Ultra. Both have 4 GB of RAM and a Octa-Core processing unit.
The Galaxy M21 counts with a much better camera than Asus ZenFone 3 Ultra, and although they both have a F2 diafragm aperture and the same 3840x2160 (4K) video definition, the Galaxy M21 also has higher video frame rate and a camera with a way better resolution. The Asus ZenFone 3 Ultra has a little bit more memory capacity for games and applications than Galaxy M21, because although it has a SD memory card expansion slot that supports up to 200 GB against 512 GB, it also counts with more internal memory capacity.
The Samsung Galaxy M21 features superior battery performance than Asus ZenFone 3 Ultra, because it has 6000mAh of battery capacity.
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