Both Oppo A78 4G and Vivo V40 Lite 4G comes with same RAM. Both have the same amount of internal memory.
| Name | Oppo A78 4G | Vivo V40 Lite 4G | 
| RAM | 8 GB | 8 GB | 
|---|---|---|
| Display | 6.43 in | 6.67 in | 
| Internal Memory | 128 GB | 128 GB | 
| Battery | 5000 mAh | 5000 mAh | 
| Camera | 50 MP + 2 MP Dual | 50 MP + 2 MP Dual | 
| Price | Rs. 15499 | Rs. 18990 | 
The launch Date of the first phone is July 10, 2023. The cost of Oppo A78 4G is Rs. 15499. The launch Date of the second phone is September 25, 2024. The Expected cost of Vivo V40 Lite 4G is Rs. 18990.
Vivo V40 Lite 4G has larger screen size of 6.67 inches in comparison to Oppo A78 4G'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 395 PPI display density. In terms of screen to body ratio, OPPO's phone has better screen to body ratio of ~ 90.8% than Vivo's phone ~ 86.7%.
Both mobiles come with 8 GB RAM and both have same Internal Memory of 128 GB.
Oppo A78 4G has 50 MP + 2 MP Dual Rear Camera in comparison to Vivo V40 Lite 4G's 50 MP + 2 MP Dual Rear Camera. Vivo V40 Lite 4G will be better choice if you're looking to click lot of selfies as it has better 32 MP Front Camera in comparison to Oppo A78 4G's 8 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version 13 and the second one on 14 version.
| Name | Oppo A78 4G | Vivo V40 Lite 4G | 
| General | ||
| Model | A78 4G | V40 Lite 4G | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM (Hybrid Slot) | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano SIM | Nano+Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | July 10, 2023 | September 25, 2024 | 
| Design | ||
| Dimensions | 73.2 x 160 x 7.9 mm | 75.9 x 163.2 x 7.8 mm | 
| Weight | 180 g | 188 g | 
| Bezel less | Yes | |
| Colors | Mist Black , Aqua Green | Titanium Silver, Carbon Black, Pearl Violet | 
| Display | ||
| Type | Color AMOLED Screen (16.7 M) | Color AMOLED Screen (1B Colors) | 
| Touch | Yes | Yes | 
| Size | 6.43 inches, 1080 x 2400 pixels, 90 Hz | 6.67 inches, 1080 x 2400 pixels | 
| Aspect Ratio | 20:9 | |
| PPI | ~ 409 PPI | ~ 395 PPI | 
| Screen to Body Ratio | ~ 90.8% | ~ 86.7% | 
| Glass Type | Corning Gorilla Glass 5 | |
| Features | 100% DCI-P3, 600nits (Typical), 430nits (Typical) | 1200 nits (HBM), 1800 nits (peak) | 
| Notch | Yes, Punch Hole | Yes, Punch Hole | 
| Memory | ||
| RAM | 8 GB | 8 GB | 
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 128 GB | 128 GB | 
| Storage Type | UFS 2.2 | UFS 2.2 | 
| Card Slot | Yes, upto 1 TB | Yes, (Hybrid Slot) | 
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| VoLTE | Yes | Yes, Dual Stand-By | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Wifi Version | Wi-Fi 5 (802.11ac) | |
| Bluetooth | Yes, v5.0, A2DP, LE, aptX HD | Yes, v5.0 | 
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 | 
| USB Features | USB on-the-go, USB Charging | |
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes | 
| Fingerprint Sensor | Yes, In Display | Yes, In Display | 
| Face Unlock | Yes | Yes | 
| Sensors | accelerometer, gyro, proximity, compass | Accelerometer, Gyro, Proximity, Compass | 
| 3.5mm Headphone Jack | Yes | No | 
| NFC | Yes, Yes (market/region dependent) | Yes | 
| Water Resistance | Yes | |
| IP Rating | IP54 | IP64 | 
| Dust Resistant | Yes | Yes | 
| Extra Features | Dual Stereo Speakers, LPDDR4x RAM | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) PDAF 2 MP ƒ/2.4 (Depth Sensor)  | 50 MP ƒ/1.8 (Wide Angle) 1/1.95", 0.8µm, PDAF 2 MP ƒ/2.4 (Depth Sensor)  | 
| Auto Focus | Yes | |
| Features | Photos, videos, night, expert, panoramic, portrait, time-lapse, slow-motion, super text, Google lens, extra HD, multi-scene recording, and cute | Panorama, HDR | 
| Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 8 MP ƒ/2 (Wide Angle) Punch Hole, Screen Flash  | 32 MP ƒ/2.5 (Wide Angle) Punch Hole  | 
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD | 
| Technical | ||
| OS | Android v13 | Android v14 | 
| Custom UI | ColorOS 13.1 | |
| Chipset | Qualcomm Snapdragon 680 | Qualcomm Snapdragon 685 | 
| CPU | 2.4 GHz, Octa Core Processor | 2.8 GHz, Octa Core Processor | 
| Core Details | 4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver | 4x Cortex-A73@2.8 GHz & 4x Cortex-A53@1.9 GHz | 
| GPU | Adreno 610 | Adreno 610 | 
| Java | No | No | 
| Browser | Yes | Yes | 
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | Yes | 
| Video | Yes | Yes | 
| FM Radio | No | No | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 5000 mAh, Li-Po Battery | 5000 mAh | 
| Fast Charging | Yes, 67W Fast Charging | Yes, 80W | 
| Reverse Charging | Yes | |