Both OPPO K9 Pro 5G and Vivo V27 comes with same RAM. Both have the same amount of internal memory.
| Name | OPPO K9 Pro 5G | Vivo V27 | 
| RAM | 8 GB | 8 GB | 
|---|---|---|
| Display | 6.43 in | 6.78 in | 
| Internal Memory | 128 GB | 128 GB | 
| Battery | 4400 mAh | 4600 mAh | 
| Camera | 64 MP + 8 MP + 2 MP Triple | 50 MP + 8 MP + 2 MP Triple | 
| Price | Rs. 27990 | Rs. 28999 | 
The launch Date of the first phone is September 26, 2021. The cost of OPPO K9 Pro 5G is Rs. 27990. The launch Date of the second phone is March 01, 2023. The cost of Vivo V27 is Rs. 28999.
Vivo V27 has larger screen size of 6.78 inches in comparison to OPPO K9 Pro 5G's 6.43 inch screen. Both the phones have AMOLED Screen Type. OPPO's phone has display density of 409 PPI & Vivo's phone has only 388 PPI display density. In terms of screen to body ratio, OPPO's phone has better screen to body ratio of ~ 91.7% than Vivo's phone ~ 90.4%. OPPO K9 Pro 5G has 20:9 aspect ratio where as Vivo V27 has 20.5:9 aspect ratio.
Both mobiles come with 8 GB RAM and both have same Internal Memory of 128 GB.
OPPO K9 Pro 5G's 64 MP + 8 MP + 2 MP Triple Rear Camera outclasses Vivo V27's 50 MP + 8 MP + 2 MP Triple Rear Camera in terms of resolution. Vivo V27 will be better choice if you're looking to click lot of selfies as it has better 50 MP Front Camera in comparison to OPPO K9 Pro 5G'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 13 version.
| Name | OPPO K9 Pro 5G | Vivo V27 | 
| General | ||
| Country of Origin | India | |
| Model | K9 Pro | V27 | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano+Nano SIM | Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | September 26, 2021 | March 01, 2023 | 
| Design | ||
| Dimensions | 73.5 x 158.7 x 8.5 mm | 74.8 x 164.1 x 7.4 mm | 
| Weight | 180 g | 180 g | 
| Bezel less | Yes | |
| Colors | Noble Black, Magic Blue | |
| Display | ||
| Type | Color AMOLED Screen (16.7M) | Color AMOLED Screen (1B Colors) | 
| Touch | Yes | Yes | 
| Size | 6.43 inches, 1080 x 2400 pixels, 120 Hz | 6.78 inches, 1080 x 2400 pixels, 120 Hz | 
| Aspect Ratio | 20:9 | 20.5:9 | 
| PPI | ~ 409 PPI | ~ 388 PPI | 
| Screen to Body Ratio | ~ 91.7% | ~ 90.4% | 
| Features | HDR10 | AG Glass, HDR 10+ | 
| Notch | Yes, Punch Hole | Yes, Punch Hole | 
| Curved Display | Yes | |
| Memory | ||
| RAM | 8 GB | 8 GB | 
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 128 GB | 128 GB | 
| Storage Type | UFS 3.1 | |
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| 5G | Yes | Yes | 
| VoLTE | Yes | Yes | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Wifi Version | Wi-Fi 6 (802.11 a/b/g/n/ac/ax), Dual Band | |
| Bluetooth | Yes, v5.2, A2DP, LE, aptX HD | Yes, v5.3 | 
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 | 
| USB Features | USB Tethering, USB on-the-go, USB Charging | USB on-the-go, USB Charging | 
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS | GPS, BEIDOU, GLONASS, GALILEO, QZSS, NavIC | 
| Fingerprint Sensor | Yes, In Display | Yes, In Display | 
| Face Unlock | Yes | Yes | 
| Sensors | Accelerometer, Gyro, Proximity, Compass, Light Sensor, Geomagnetic Induction, Step Function | accelerometer, gyro, proximity, compass | 
| 3.5mm Headphone Jack | Yes | No | 
| NFC | Yes | |
| Camera | ||
| Rear Camera | 64 MP ƒ/1.7 (Wide Angle) 8 MP ƒ/2.2 (Ultra Wide) 2 MP ƒ/2.4 (Macro) Macro | 50 MP ƒ/1.9 (Wide Angle) 1/1.56", 1.0µm, PDAF, OIS 8 MP ƒ/2.2 (Ultra Wide) 16mm, 120˚, 1/4", 1.12µm 2 MP ƒ/2.4 (Macro) | 
| Camera Sensor | Sony IMX766V (OIS | |
| OIS | Yes | |
| Auto Focus | Yes | Yes | 
| Features | Portraits, Night Scenes, Panoramas, Cute Shooting, Multi-scene Video, AI ID Photos, Time-lapse Photography, Instant Recording Templates | Night, Portrait, Photo, Video, Micro Movie, High Resolution, Pano, Documents, Slo-mo, Time-Lapse, Supermoon, Pro, Sports, Double Exposure, Dual View, Live Photo | 
| Video Recording | 4K @ 30 fps UHD, 1080p @ 30 fps FHD | 4K @ 30 fps UHD, 1080p @ 30 fps FHD | 
| Flash | Yes, Dual LED | Yes, LED | 
| Front Camera | 16 MP ƒ/2.4 (Wide Angle) Punch Hole, Screen Flash | 50 MP ƒ/2.5 (Wide Angle) AF Punch Hole, Screen Flash | 
| Front Video Recording | 1080p @ 30 fps FHD | 4K @ 30 fps UHD, 1080p @ 30 fps FHD | 
| Technical | ||
| OS | Android v11, upgradable to v12 | Android v13 | 
| Custom UI | Funtouch OS 13 | |
| Chipset | MediaTek Dimensity 1200 | Mediatek Dimensity 7200 | 
| CPU | 3 GHz, Octa Core Processor | 2.8 GHz, Octa Core Processor | 
| Core Details | 1x3.0 GHz Cortex-A78 & 3x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55 | 2.8GHz×2+2.0GHz×6 | 
| GPU | Mali-G77 MC9 | Mali-G610 MC4 | 
| Java | No | No | 
| Browser | Yes | Yes | 
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | AAC, OGG, FLAC, WAV, APE, MP3, MP2, MP1, OPUS, M4A | 
| Video | Yes | MP4, 3GP, AVI, FLV, MKV | 
| FM Radio | No | No | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 4400 mAh, Li-Po Battery | 4600 mAh, Li-Po Battery | 
| Fast Charging | Yes, 60W Super Flash Charging | Yes, 66W Fast Charging | 
| Wireless Charging | Yes | |