Compare Vivo S1 vs Oppo A7

Specifications
Key Specifications
Display Size 6.53 inches 6.2 inches
Operating System Funtouch 9.0 OS (Android 9.0 Pie); Android 8.1 (Oreo)
RAM 4 GB RAM or 6 GB RAM 3/4 GB RAM
Rear Camera 12 MP 13 MP
Battery Capacity Fast charging,Non-removable Li-Ion 3940 mAh Non-removable Li-Ion 4230 mAh battery
General Features
Release Date 2019, May 2018, November
SIM Support Nano-SIM , Dual Sim Dual SIM (Nano-SIM, dual stand-by)
Phone Dimensions 6.38 x 2.99 x 0.34 in 6.14 x 2.97 x 0.32 in
Phone Weight 189 g 168 g
Operating System Funtouch 9.0 OS (Android 9.0 Pie); Android 8.1 (Oreo)
Display
Screen Size 6.53 inches 6.2 inches
Screen Resolution 1080 x 2340 pixels 720 x 1520 pixels
Screen Type IPS Capacitive, Multi-touch IPS LCD capacitive touchscreen, 16M colors
Screen Protection Capacitive, Multi-touch, Scratch resistant Corning Gorilla Glass 3
Memory
Internal Memory 128/256 GB 32/64 GB
RAM 4 GB RAM or 6 GB RAM 3/4 GB RAM
Card Slot microSD, microSDHC, microSDXC microSD, up to 256 GB (dedicated slot)
Performance
Processor 4x 2.1 GHz ARM Cortex-A73, 4x 1.95 GHz ARM Cortex-A53 Octa-core 1.8 GHz Cortex-A53
GPU ARM Mali-G72 MP3 Adreno 506
Battery
Type Fast charging,Non-removable Li-Ion 3940 mAh Non-removable Li-Ion 4230 mAh battery
Camera
Front Camera 24 MP 16 MP
Front Flash Light No No
Front Video Recording 2 MP No
Back Flash Light Yes Yes
Back Camera 12 MP 13 MP
Back Video Recording 0 MP 1080p@30fps
Connectivity
Bluetooth Yes Yes
3G Yes Yes
4G/LTE Yes Yes
Radio Yes FM radio
WiFi Yes Yes
NFC No