Compare HTC One M8 dual sim vs HTC Desire 728

Specifications
Key Specifications
Display Size 5.0 inches 5.5 inches
Operating System Android 4.4.2 (KitKat), upgradable to 4.4.4 (KitKat) Android 5.1.1 (Lollipop)
RAM 2 GB RAM 2 GB RAM - Desire 728
Rear Camera 4 MP 13 MP
Battery Capacity Non-removable Li-Po 2600 mAh battery Non-removable Li-Po 2800 mAh battery
General Features
Release Date 2014, June 2015, September
SIM Support Dual SIM (Nano-SIM, dual stand-by) Dual SIM (Nano-SIM, dual stand-by)
Phone Dimensions 5.76 x 2.78 x 0.37 in 6.22 x 3.06 x 0.31 in
Phone Weight 160 g 153 g
Operating System Android 4.4.2 (KitKat), upgradable to 4.4.4 (KitKat) Android 5.1.1 (Lollipop)
Display
Screen Size 5.0 inches 5.5 inches
Screen Resolution 1080 x 1920 pixels 720 x 1280 pixels
Screen Type Super LCD3 capacitive touchscreen, 16M colors Super LCD2 capacitive touchscreen, 16M colors
Screen Protection Corning Gorilla Glass 3
Memory
Internal Memory 16 GB 16 GB
RAM 2 GB RAM 2 GB RAM - Desire 728
Card Slot microSD, up to 256 GB (dedicated slot) microSD, up to 256 GB (dedicated slot)
Performance
Processor Quad-core 2.3 GHz Octa-core 1.3 GHz Cortex-A53
GPU Adreno 330 Mali-T720MP3
Battery
Type Non-removable Li-Po 2600 mAh battery Non-removable Li-Po 2800 mAh battery
Camera
Front Camera 5 MP 5 MP
Front Flash Light No
Front Video Recording 1080p@30fps 1080p@30fps
Back Flash Light Yes Yes
Back Camera 4 MP 13 MP
Back Video Recording 1080p@60fps, 720p@120fps, HDR, stereo sound rec. 1080p@30fps
Connectivity
Bluetooth Yes Yes
3G Yes Yes
4G/LTE Yes Yes
Radio Stereo FM radio, RDS FM radio
WiFi Yes Yes
NFC Yes (market/operator dependent)