OnePlus 6 has better RAM than Samsung Galaxy M21. In terms of display resolution, Samsung Galaxy M21 has better resolution of 2340 x 1080 than OnePlus 6 which has resolution of 2280 x 1080. Both have the same amount of internal memory.
| Name | OnePlus 6 | Samsung Galaxy M21 |
| RAM | 6 GB | 4 GB |
|---|---|---|
| Display | 6.28 in | 6.4 in |
| Internal Memory | 64 GB | 64 GB |
| Battery | 3300 mAh | 6000 mAh |
| Camera | 20 MP + 16 MP Dual | 48 MP + 8 MP + 5 MP Triple |
| Price | Rs. 34999 | Rs. 14980 |
The launch Date of the first phone is May, 2018. The cost of OnePlus 6 is Rs. 34999. The launch Date of the second phone is March 18, 2020. The cost of Samsung Galaxy M21 is Rs. 14980.
Samsung Galaxy M21 has larger screen size of 6.4 inches in comparison to OnePlus 6's 6.28 inch screen. OnePlus 6 has AMOLED Screen type where as Samsung Galaxy M21 has Super AMOLED Screen type. Samsung's phone has display density of 403 PPI & OnePlus's phone has only 402 PPI display density. OnePlus 6 has 19:9 aspect ratio where as Samsung Galaxy M21 has 19.5:9 aspect ratio.
OnePlus 6's larger 6 GB RAM is better for playing games and all with respect to Samsung Galaxy M21's lower 4 GB RAM. and both have same Internal Memory of 64 GB.
Samsung Galaxy M21's 48 MP + 8 MP + 5 MP Triple Rear Camera outclasses OnePlus 6's 20 MP + 16 MP Dual Rear Camera in terms of resolution. Samsung Galaxy M21 will be better choice if you're looking to click lot of selfies as it has better 20 MP Front Camera in comparison to OnePlus 6's 16 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version 8.1 and the second one on 10.0 version.
| Name | OnePlus 6 | Samsung Galaxy M21 |
| General | ||
| Model | Galaxy M21 | |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | May, 2018 | March 18, 2020 |
| Design | ||
| Dimensions | 75.4 x 155.69 x 7.8 mm | 75.1 x 159 x 8.9 mm |
| Weight | 177 g | 188 g |
| Display | ||
| Type | Color AMOLED Screen (16M colors Colors) | Color Super AMOLED Screen (16M Colors) |
| Touch | Yes | Yes |
| Size | 6.28 inches, 1080 x 2280 pixels | 6.4 inches, 1080 x 2340 pixels |
| Aspect Ratio | 19:9 | 19.5:9 |
| PPI | ~ 402 PPI | ~ 403 PPI |
| Screen to Body Ratio | ~ 84.2% | |
| Glass Type | Corning Gorilla Glass 3 | |
| Features | Corning Gorilla Glass 5 Screen Protection | 420 nits (peak) |
| Notch | Yes, Water Drop Notch | |
| Memory | ||
| RAM | 6 GB | 4 GB |
| Storage | 64 GB | 64 GB |
| Card Slot | No | Yes, upto 512 GB |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| VoLTE | Yes | Yes |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Bluetooth | Yes, v5.0 | Yes, v5.0 |
| USB | Yes, Type-C 1.0 reversible connector v2.0 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | |
| Extra | ||
| GPS | Yes, with A-GPS Support | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Fingerprint Sensor | Yes | Yes, Rear |
| Face Unlock | Yes | Yes |
| Sensors | Accelerometer, Gyroscope, Compass | Accelerometer, Gyro Sensor, Geomagnetic Sensor, Proximity Sensor, Virtual Light Sensing |
| 3.5mm Headphone Jack | Yes | Yes |
| NFC | Yes | |
| Extra | DLNA | |
| Camera | ||
| Rear Camera | 16 MP + 20 MP | 48 MP ƒ/2 (Wide Angle) 8 MP ƒ/2.2 (Ultra Wide) 5 MP ƒ/2.2 (Depth Sensor) |
| Auto Focus | Yes | Yes |
| Features | Face detection, Geo tagging, Panorama, Touch to focus | Panorama, HDR |
| Video Recording | 4K @ 60 fps UHD | 4K @ 30 fps UHD, 1080p @ 30 fps FHD |
| Flash | Yes, Dual LED | Yes, LED |
| Front Camera | 16 MP | 20 MP ƒ/2 (Wide Angle) |
| Front Video Recording | 1080p @ 30 fps FHD | |
| Technical | ||
| OS | Android v8.1 (Oreo), upgradable to v10 | Android v10.0, upgradable to v11 |
| Chipset | Qualcomm Snapdragon 845 | Samsung Exynos 9611 |
| CPU | 2.8 GHz, Octa Core Processor | 2.3 GHz, Octa Core Processor |
| Core Details | 4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53 | |
| GPU | Adreno 630 | Mali-G72 MP3 |
| Java | Yes, via 3rd party | No |
| Browser | Yes, supports HTML | Yes, supports HTML5 |
| Multimedia | ||
| Supports | MMS, Instant Messaging | |
| Yes, with Push Email | Yes | |
| Music | MP3, eAAC+, WMA, WAV, FLAC | MP3, M4A, 3GA, AAC, OGG, OGA, WAV, WMA, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA |
| Video | DivX, MP4 | MP4, M4V, 3GP, 3G2, WMV, ASF, AVI, FLV, MKV, WEBM |
| FM Radio | No | Yes |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 3300 mAh, Li-Po Battery | 6000 mAh, Li-Po Battery |
| Fast Charging | Yes, 15W Fast Charging | |