Compare Xiaomi Redmi Note 8 vs Vivo S1

Specifications
Key Specifications
Display Size 6.4 Inches 6.53 inches
Operating System Android 9.0 (Pie) Funtouch 9.0 OS (Android 9.0 Pie);
RAM 6GB 4 GB RAM or 6 GB RAM
Rear Camera N/A 12 MP
Battery Capacity (Li-Po Non removable), 4500 mAh - Fast battery charging (Quick Charge 4 Fast charging,Non-removable Li-Ion 3940 mAh
General Features
Release Date 2019 2019, May
SIM Support Dual Sim, Dual Standby (Nano-SIM) Nano-SIM , Dual Sim
Phone Dimensions N/A 6.38 x 2.99 x 0.34 in
Phone Weight N/A 189 g
Operating System Android 9.0 (Pie) Funtouch 9.0 OS (Android 9.0 Pie);
Display
Screen Size 6.4 Inches 6.53 inches
Screen Resolution 1080 x 2340 Pixels (~403 PPI) 1080 x 2340 pixels
Screen Type IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch IPS Capacitive, Multi-touch
Screen Protection Corning Gorilla Glass 5 Capacitive, Multi-touch, Scratch resistant
Memory
Internal Memory 128GB 128/256 GB
RAM 6GB 4 GB RAM or 6 GB RAM
Card Slot microSD Card, (supports up to 256GB) (uses SIM 2 slot) microSD, microSDHC, microSDXC
Performance
Processor Octa-Core 4x 2.1 GHz ARM Cortex-A73, 4x 1.95 GHz ARM Cortex-A53
GPU Adreno 618 ARM Mali-G72 MP3
Battery
Type (Li-Po Non removable), 4500 mAh - Fast battery charging (Quick Charge 4 Fast charging,Non-removable Li-Ion 3940 mAh
Camera
Front Camera 25MP 24 MP
Front Flash Light N/A No
Front Video Recording Yes 2 MP
Back Flash Light Yes Yes
Back Camera N/A 12 MP
Back Video Recording Yes 0 MP
Connectivity
Bluetooth v5.0 with A2DP, LE Yes
3G (HSPA 42.2/5.76 Mbps Yes
4G/LTE LTE-A Yes
Radio FM Radio with recording Yes
WiFi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Yes
NFC Yes No