Compare phones
| Global Score | |
| 73.9 | 84.1 |
| Basic Information | |
| Oppo | Samsung |
| Android 10, 9.0 Pie | Android 11, 10 |
| 2019-10-18 | 2020-03-23 |
| 6.30 x 2.93 x 0.37 inches | 6.26 x 2.96 x 0.35 inches |
| 6.67 ounces | 6.63 ounces |
| Luminous black, Ocean blue and Sunset pink | Midnight blue and Raven black |
| Aluminum and Glass (Corning Gorilla Glass 5) | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| AMOLED | Super AMOLED |
| 405 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 730G SM7150-AB chipset | Exynos 9611 chipset |
| Kryo 470, 64-bit, 8 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 618 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 256 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 17.34 | 11.74 |
| Camera | |
| 48.00 MP + 16.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 28.00mm focal length | 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 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
Samsung Galaxy M21 has a global score of 84.1, which is much better than the OPPO Reno2's score of 73.9. Both of these phones include Android OS, but the Samsung Galaxy M21 has newer 11 version and OPPO Reno2 has Android 10, so it provides some nice extra features. Even though Samsung Galaxy M21 and OPPO Reno2 were released only 5 months apart, Samsung Galaxy M21 is just a bit thinner and a little bit lighter.
Galaxy M21 and OPPO Reno2 feature quite similar processors, and although the Galaxy M21 has less RAM, they both have a Octa-Core processing unit. Samsung Galaxy M21 counts with a little sharper display than OPPO Reno2, although it has a little smaller display, a little lower resolution of 1080 x 2340px and a just a bit lower pixels density.
Galaxy M21 counts with a camera that is just as good as OPPO Reno2's camera, and although the Galaxy M21 has a tinier diafragm aperture which is not recommended for low-light photography and video, they both have the same video frame rates, the same 3840x2160 video quality, a 0.5 inches back camera sensor and a same resolution back facing camera.
OPPO Reno2 has a way bigger memory to install applications and games or saving photos and videos than Galaxy M21, and although they both have a slot for external memory cards that supports a maximum of 512 GB, the OPPO Reno2 also has more internal storage capacity. Samsung Galaxy M21 counts with a way better battery duration than OPPO Reno2, because it has a 50% larger battery capacity.
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