Compare phones
| Global Score | |
| 72.1 | 84.1 |
| Basic Information | |
| Oppo | Samsung |
| Android 10 | Android 11, 10 |
| 2020-08-05 | 2020-03-23 |
| 6.31 x 2.88 x 0.30 inches | 6.26 x 2.96 x 0.35 inches |
| 5.68 ounces | 6.63 ounces |
| Silky white and Starry night | Midnight blue and Raven black |
| Plastic and Plastic | 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 |
| Super AMOLED | Super AMOLED |
| 405 pixels per inch | 403 pixels per inch |
| 1100 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 9 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 720G SM7125 chipset | Exynos 9611 chipset |
| Kryo 465, 64-bit, 8 nm (Octa-Core 2300 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 |
| 9.36 | 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 | |
| 48.00 MP + 32.00 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 |
| 1280 x 720 (240 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.66 | 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 | |
| 4000mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.1 | 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 better than OPPO Reno4 Pro, getting an 84.1 score against 72.1. Even being the best device in this review, it must be noted that it is also a heavier and somewhat thicker device. Both phones in this comparison work with Android OS (Operating System), but the Galaxy M21 has a newer 11 version while OPPO Reno4 Pro has Android 10.
The OPPO Reno4 Pro features a bit better screen than Galaxy M21, because it has a bit greater display density, a quite bigger display, a slightly better 1080 x 2400 resolution and a really brighter screen. Galaxy M21 has a quite bigger memory capacity to install games and applications than OPPO Reno4 Pro, because although it has just 64 GB internal memory, it also counts with a slot for an external memory card that holds up to 512 GB.
OPPO Reno4 Pro counts with a bit better processing power than Samsung Galaxy M21, and although they both have a Octa-Core CPU, the OPPO Reno4 Pro also has a higher amount of RAM memory. OPPO Reno4 Pro has a bit better camera than Galaxy M21, and although they both have the same 30 frames per second video frame rates, a same size back-facing camera sensor, the same (4K) video quality and a same resolution back camera, the OPPO Reno4 Pro also has a larger aperture.
The Samsung Galaxy M21 features a very superior battery duration than OPPO Reno4 Pro, because it has a 50 percent greater battery capacity.
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