Compare phones
| Global Score | |
| 72.8 | 84.1 |
| Basic Information | |
| Oppo | Samsung |
| Android 9.0 Pie | Android 11, 10 |
| 2019-06-05 | 2020-03-23 |
| 6.17 x 2.93 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 6.53 ounces | 6.63 ounces |
| Black and Green | Midnight blue and Raven black |
| Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| AMOLED | Super AMOLED |
| 403 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 710 SDM710 chipset | Exynos 9611 chipset |
| Kryo 360, 64-bit, 10 nm (Octa-Core 2200 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 616 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 256 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 13.3 | 11.74 |
| Camera | |
| 48.00 MP + 16.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (60 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.55 | 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 | |
| 3765mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.68 | 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
Galaxy M21 is much better than OPPO Reno, getting a global score of 84.1 against 72.8. The Galaxy M21 design has the same thickness than the OPPO Reno, but it's just a little bit heavier. Both of these phones work with Android OS, but Galaxy M21 has the older 11 version and OPPO Reno has Android 9.0 Pie.
The Samsung Galaxy M21's processing unit is just as good as OPPO Reno's processor, and although the Samsung Galaxy M21 has a lower amount of RAM, they both have 8 processing cores. Samsung Galaxy M21 counts with a little more vivid display than OPPO Reno. They have a display with the same size, the same count of pixels per inch in the display and an equal resolution of 1080 x 2340px.
Galaxy M21's camera is very similar to the OPPO Reno one, and although the Galaxy M21 has a tinier aperture which is not good for low-light images and videos, they both have the same back camera sensor size, the same 30 frames per second video frame rates, the same resolution camera and the same (4K) video quality.
The OPPO Reno counts with a better storage for games and applications than Galaxy M21, because although it has no external memory slot, it also counts with more internal memory capacity. The Galaxy M21 counts with a much longer battery life than OPPO Reno, because it has 6000mAh of battery capacity.
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