Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) has better RAM than OPPO A55 4G. In terms of display resolution, Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) has better resolution of 2340 x 1080 than OPPO A55 4G which has resolution of 1600 x 720. Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) has more internal memory than OPPO A55 4G
| Name | OPPO A55 4G | Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) | 
| RAM | 4 GB | 8 GB | 
|---|---|---|
| Display | 6.51 in | 6.53 in | 
| Internal Memory | 64 GB | 128 GB | 
| Battery | 5000 mAh | 4500 mAh | 
| Camera | 50 MP + 2 MP + 2 MP Triple | 64 MP Quad | 
| Price | Rs. 12990 | Rs. 14999 | 
The launch Date of the first phone is October 1, 2021 . The cost of OPPO A55 4G is Rs. 12990. The launch Date of the second phone is October 16, 2019. The cost of Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) is Rs. 14999.
OPPO A55 4G has screen size of 6.51 inches which falls short to Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB)'s 6.53 inch screen. Both the phones have IPS LCD Screen Type. Xiaomi's phone has display density of 403 PPI & OPPO's phone has only 269 PPI display density. In terms of screen to body ratio, OPPO's phone has better screen to body ratio of ~ 89.2% than Xiaomi's phone ~ 84.9%. OPPO A55 4G has 20:9 aspect ratio where as Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) has 19.5:9 aspect ratio.
Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB)'s larger 8 GB RAM is better for playing games and all with respect to OPPO A55 4G's lower 4 GB RAM. Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) has more Internal Memory (128 GB) than OPPO A55 4G (64 GB).
Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB)'s 64 MP Quad Rear Camera outclasses OPPO A55 4G's 50 MP + 2 MP + 2 MP Triple Rear Camera in terms of resolution. Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 20 MP Front Camera in comparison to OPPO A55 4G's 16 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version 11 and the second one on v9.0 version.
| Name | OPPO A55 4G | Xiaomi Redmi Note 8 Pro (8GB RAM + 128GB) | 
| General | ||
| Model | A55 4G | Redmi Note 8 Pro | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano+Nano SIM | Nano+Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | October 1, 2021 | October 16, 2019 | 
| Design | ||
| Dimensions | 75.7 x 163.9 x 8.4 mm | 76.4 x 161.7 x 8.8 mm | 
| Weight | 193 g | 200 g | 
| Display | ||
| Type | Color IPS LCD Screen (16M Colors) | Color IPS LCD Screen (16M Colors) | 
| Touch | Yes | Yes | 
| Size | 6.51 inches, 720 x 1600 pixels, 60 Hz | 6.53 inches, 1080 x 2340 pixels | 
| Aspect Ratio | 20:9 | 19.5:9 | 
| PPI | ~ 269 PPI | ~ 403 PPI | 
| Screen to Body Ratio | ~ 89.2% | ~ 84.9% | 
| Features | Corning Gorilla Glass 5, 2.5D Curved Glass | |
| Notch | Yes, Punch Hole | Yes, Water Drop Notch | 
| Memory | ||
| RAM | 4 GB | 8 GB | 
| Storage | 64 GB | 128 GB | 
| Card Slot | Yes, upto 256 GB | Yes, upto 512 GB | 
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| 5G | No | |
| VoLTE | Yes | Yes, Dual Stand-By | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Bluetooth | Yes, v5.0, A2DP, LE, aptX HD | Yes, v5.0, A2DP, LE | 
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 | 
| USB Features | USB on-the-go, USB Charging | USB on-the-go | 
| IR Blaster | Yes | |
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS | Yes, with A-GPS Support | 
| Fingerprint Sensor | Yes, Side | Yes, Rear | 
| Face Unlock | Yes | Yes | 
| Sensors | Geomagnetic Sensor, Light Sensor, Proximity Sensor, Accelerometer, Gravity Sensor, Compass | Proximity sensor, Ambient light sensor, Accelerometer, Gyroscope, Electronic compass | 
| 3.5mm Headphone Jack | Yes | Yes | 
| Extra Features | UFS2.1, Amazon Alexa Built-in | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) 2 MP ƒ/2.4 (Macro) Macro 2 MP ƒ/2.4 (Depth Sensor)  | 64 MP ƒ/1.7 (Wide Angle) 8 MP ƒ/2.2 (Ultra Wide) 2 MP ƒ/2.4 (Macro) Macro Lens 2 MP ƒ/2.4 (Depth Sensor)  | 
| Auto Focus | Yes | Yes | 
| Features | Night, Portrait, Panoramic, Macro, Sticker, Time-lapse, Expert | Night mode, AI Scene detection, Smart ultra-wide angle mode | AI Beautify | Burst mode | Tilt-shift | Level display | Custom watermark | Pro mode | AI Portrait mode, 3D Lighting, Panorama mode | 
| Video Recording | 1080p @ 30 fps FHD | 4K @ 30 fps UHD, 1080p @ 30/60 fps FHD, 720p @ 30 fps HD | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 16 MP ƒ/2 (Wide Angle) Punch Hole  | 20 MP ƒ/2 (Main) | 
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD, 720p @ 30 fps HD | 
| Technical | ||
| OS | Android v11 | Android v9.0 (Pie) | 
| Chipset | MediaTek Helio G35 | mediatek Helio G90T | 
| CPU | 2.3 GHz, Octa Core Processor | 2.05 GHz, Octa Core Processor | 
| Core Details | Arm Cortex-A53 | 2x2.05 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55 | 
| GPU | IMG PowerVR GE8320 | Arm Mali-G76 3EEMC4 | 
| Java | No | No | 
| Browser | Yes, supports HTML5 | Yes, supports HTML5 | 
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | MP3, AMR, FLAC, APE | 
| Video | Yes | MP4, M4V, MKV, XVID | 
| FM Radio | No | Yes | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 5000 mAh, Li-Po Battery | 4500 mAh, Li-Po Battery | 
| Fast Charging | Yes, 18W Fast Charge | Yes, 18W Fast Charging | 
| StandBy Time | 27 days | |
| Talk Time | 2 days | |