Compare phones
| Global Score | |
| 72.6 | 84.1 |
| Basic Information | |
| Samsung | |
| Android 10 | Android 11, 10 |
| 2020-06-02 | 2020-03-23 |
| 6.45 x 2.98 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 7.13 ounces | 6.63 ounces |
| Arctic white and Glacier blue | Midnight blue and Raven black |
| Glass and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 380.00 | -- |
| Display / Screen | |
| 6.6 inches | 6.4 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 399 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.2 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 855+ SM8150-AC chipset | Exynos 9611 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2960 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 640 GPU | Mali-G72 MP3 GPU |
| 9.72 | 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 + 32.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.59 inches (1/1.7") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 12.54 | 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, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4200mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.08 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | 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 |
Comparison review
The Galaxy M21 is much better than the realme X3 SuperZoom, with an 84.1 score against 72.6. These phones include Android OS (operating system), but the Galaxy M21 has a newer 11 version and realme X3 SuperZoom has Android 10. Galaxy M21's design has the same thickness than realme X3 SuperZoom, but it's just a bit lighter.
Galaxy M21 features a bit better looking display than realme X3 SuperZoom, because although it has a little bit smaller screen and a little bit lower resolution of 1080 x 2340 pixels, it also counts with a little better pixel density. The Samsung Galaxy M21 has a quite bigger storage capacity to install applications and games than realme X3 SuperZoom, because although it has less internal memory capacity, it also counts with a slot for external memory cards that admits up to 512 GB.
The realme X3 SuperZoom features a little faster processing unit than Samsung Galaxy M21, and although they both have 8 processing cores, the realme X3 SuperZoom also has a greater amount of RAM memory. The realme X3 SuperZoom has just a bit better camera than Samsung Galaxy M21, and although they both have the same (4K) video quality, the realme X3 SuperZoom also has a bigger back-facing camera sensor capturing better quality videos and pictures, a much more mega-pixels camera in the back, higher 60 frames per second video frame rate and a larger aperture.
The Samsung Galaxy M21 counts with a superior battery performance than realme X3 SuperZoom, because it has a 6000mAh battery size against 4200mAh.
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