Oppo A78 has better RAM than Vivo T1 5G (6GB RAM + 128GB). In terms of display resolution, Vivo T1 5G (6GB RAM + 128GB) has better resolution of 2408 x 1080 than Oppo A78 which has resolution of 1612 x 720. Both have the same amount of internal memory.
| Name | Vivo T1 5G (6GB RAM + 128GB) | Oppo A78 | 
| RAM | 6 GB | 8 GB | 
|---|---|---|
| Display | 6.58 in | 6.56 in | 
| Internal Memory | 128 GB | 128 GB | 
| Battery | 5000 mAh | 5000 mAh | 
| Camera | 50 MP + 2 MP + 2 MP Triple | 50 MP + 2 MP Dual | 
| Price | Rs. 16990 | Rs. 15672 | 
The launch Date of the first phone is February 09, 2022. The cost of Vivo T1 5G (6GB RAM + 128GB) is Rs. 16990. The launch Date of the second phone is January 16, 2023. The cost of Oppo A78 is Rs. 15672.
Vivo T1 5G (6GB RAM + 128GB) has larger screen size of 6.58 inches in comparison to Oppo A78's 6.56 inch screen. Vivo T1 5G (6GB RAM + 128GB) has IPS LCD Screen type where as Oppo A78 has IPS Screen type. Vivo's phone has display density of 401 PPI & OPPO's phone has only 269 PPI display density. In terms of screen to body ratio, Vivo's phone has better screen to body ratio of ~ 90.6% than OPPO's phone ~ 84%. Vivo T1 5G (6GB RAM + 128GB) has 20:9 aspect ratio where as Oppo A78 has 20:9 aspect ratio.
Oppo A78's larger 8 GB RAM is better for playing games and all with respect to Vivo T1 5G (6GB RAM + 128GB)'s lower 6 GB RAM. and both have same Internal Memory of 128 GB.
They both have the same 50 MP + 2 MP + 2 MP Triple Rear Camera. Vivo T1 5G (6GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 16 MP Front Camera in comparison to Oppo A78's 8 MP Front Camera.
Both the phones run on Android Operating System Version 12.
| Name | Vivo T1 5G (6GB RAM + 128GB) | Oppo A78 | 
| General | ||
| Model | T1 5G | A78 | 
| Sim Type | Dual Sim, GSM+GSM (Hybrid Slot) | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano SIM | Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | February 09, 2022 | January 16, 2023 | 
| Design | ||
| Dimensions | 75.84 x 164 x 8.25 mm | 75.1 x 163.8 x 8 mm | 
| Weight | 187 g | 188 g | 
| Bezel less | Yes | |
| Colors | Glowing Black, Glowing Purple | |
| Display | ||
| Type | Color IPS LCD Screen (16.7M) | Color IPS Screen (16.7 M) | 
| Touch | Yes | Yes | 
| Size | 6.58 inches, 1080 x 2408 pixels, 120 Hz | 6.56 inches, 720 x 1612 pixels, 90 Hz | 
| Aspect Ratio | 20:9 | 20:9 | 
| PPI | ~ 401 PPI | ~ 269 PPI | 
| Screen to Body Ratio | ~ 90.6% | ~ 84% | 
| Glass Type | Panda glass | |
| Features | HDR10 | 100% DCI-P3, 600nits (Typical), 480nits (Typical) | 
| Notch | Yes, Water Drop Notch | Yes, Water Drop Notch | 
| Memory | ||
| RAM | 6 GB | 8 GB | 
| Expandable RAM | Upto 4 GB Extra Virtual RAM | Upto 8 GB Extra Virtual RAM | 
| Storage | 128 GB | 128 GB | 
| Storage Type | UFS 2.2 | |
| Card Slot | Yes, (Hybrid Slot), upto 1 TB | Yes | 
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| 5G | Yes | Yes | 
| 5G Bands | NSA: n77/78, SA: n77/78 | NR: n1/n5/n8/n28A/n41/n78 | 
| VoLTE | Yes, Dual Stand-By | Yes | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Wifi Version | Wi-Fi 5 (802.11ac) | |
| Bluetooth | Yes, v5.1, A2DP, LE, aptX HD | Yes, v5.3, A2DP, LE, aptX HD | 
| USB | Yes, USB-C | Yes, USB-C v2.0 | 
| USB Features | USB on-the-go | USB on-the-go, USB Charging | 
| Extra | ||
| GPS | Yes, with A-GPS, BEIDOU, GLONASS, GALILEO | Yes, with A-GPS, GLONASS, GALILEO, BDS | 
| Fingerprint Sensor | Yes, Side | Yes, Side | 
| Face Unlock | Yes | Yes | 
| Sensors | Accelerometer, Ambient Light Sensor, Proximity Sensor, E-compass, Gyroscope | Accelerometer, Proximity, Compass | 
| 3.5mm Headphone Jack | Yes | Yes | 
| IP Rating | IP54 | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) 2 MP ƒ/2.4 (Depth Sensor) 2 MP ƒ/2.4 (Macro) Macro  | 50 MP ƒ/1.8 (Wide Angle) 2 MP ƒ/2.4 (Depth Sensor)  | 
| Auto Focus | Yes | Yes | 
| Features | Portrait, Pano, Live Photo, Slow Motion, Time-Lapse, Pro, AR Stickers, Documents | Night, Videos, Photos, Portrait, Expert, Extra HD, Panoramic, Time-lapse, Slow-motion, Sticker, Text scanner, and Google Lens | 
| Video Recording | 1080p | 1080p @ 30 fps FHD | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 16 MP ƒ/2 (Wide Angle) | 8 MP ƒ/2 (Wide Angle) Screen Flash  | 
| Front Video Recording | 1080p | 1080p @ 30 fps FHD | 
| Technical | ||
| OS | Android v12 | Android v12 | 
| Chipset | Qualcomm Snapdragon 695 | Mediatek Dimensity 700 5G | 
| CPU | 2.2 GHz, Octa Core Processor | 2.2 GHz, Octa Core Processor | 
| Core Details | 2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver | 2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55 | 
| GPU | Adreno 619 | Mali-G57 MC2 | 
| Java | No | No | 
| Browser | Yes | Yes | 
| Multimedia | ||
| Yes | Yes | |
| Music | WAV, MP3, MP2, MIDI, Vorbis, APE, FLAC | Yes | 
| Video | MP4, 3GP, MKV, FLV | Yes | 
| FM Radio | Yes | No | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 5000 mAh, Li-Po Battery | 5000 mAh, Li-Po Battery | 
| Fast Charging | Yes, 18W Flash Charge | Yes, 33W Fast Charging | 
| Music Playback Time | 102 hours | |