Compare Asus Zenfone 3 ZE520KL vs Asus Zenfone Zoom ZX551ML

Specifications
Key Specifications
Display Size 5.2 inches 5.5 inches
Operating System Android 6.0.1 (Marshmallow), upgradable to 7.0 (Nougat) Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow)
RAM 4 GB RAM or 32 GB 3 GB RAM 4 GB RAM
Rear Camera 16 MP 13 MP
Battery Capacity Non-removable Li-Ion 2600 mAh battery Non-removable Li-Po 3000 mAh battery
General Features
Release Date 2016, July 2015, September
SIM Support Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by) Micro-SIM
Phone Dimensions 5.78 x 2.91 x 0.30 in 6.26 x 3.10 x 0.47 in
Phone Weight 144 g 185 g
Operating System Android 6.0.1 (Marshmallow), upgradable to 7.0 (Nougat) Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow)
Display
Screen Size 5.2 inches 5.5 inches
Screen Resolution 1080 x 1920 pixels 1080 x 1920 pixels
Screen Type Super IPS+ capacitive touchscreen, 16M colors IPS LCD capacitive touchscreen, 16M colors
Screen Protection Corning Gorilla Glass 3 Corning Gorilla Glass 4
Memory
Internal Memory 64 GB 32/64/128 GB
RAM 4 GB RAM or 32 GB 3 GB RAM 4 GB RAM
Card Slot microSD, up to 256 GB (uses SIM 2 slot) microSD, up to 256 GB (dedicated slot)
Performance
Processor Octa-core 2.0 GHz Cortex-A53 Quad-core 2.5 GHz
GPU Adreno 506 PowerVR G6430
Battery
Type Non-removable Li-Ion 2600 mAh battery Non-removable Li-Po 3000 mAh battery
Camera
Front Camera 8 MP 5 MP
Front Flash Light
Front Video Recording 1080p@30fps No
Back Flash Light Yes Yes
Back Camera 16 MP 13 MP
Back Video Recording 2160p@30fps, 1080p@60fps 1080p@30fps
Connectivity
Bluetooth Yes Yes
3G Yes Yes
4G/LTE Yes Yes
Radio FM radio, RDS No
WiFi Yes Yes
NFC Yes