Compare Microsoft Lumia 640 XL Dual SIM vs Sony Xperia M2 Dual

Specifications
Key Specifications
Display Size 5.7 inches 4.8 inches
Operating System Microsoft Windows Phone 8.1 with Lumia Denim Android 4.3 (Jelly Bean), 4.4.4 (KitKat), planned upgrade to 5.1 (Lollipop)
RAM 1 GB RAM 1 GB RAM
Rear Camera 13 MP 8 MP
Battery Capacity Li-Ion 3000 mAh battery Non-removable Li-Ion 2300 mAh battery
General Features
Release Date 2015, March 2014, February
SIM Support Dual SIM (Micro-SIM, dual stand-by) Dual SIM (Micro-SIM, dual stand-by, dual active)
Phone Dimensions 6.22 x 3.21 x 0.35 in 5.5 x 2.80 x 0.34 in
Phone Weight 171 g 148 g
Operating System Microsoft Windows Phone 8.1 with Lumia Denim Android 4.3 (Jelly Bean), 4.4.4 (KitKat), planned upgrade to 5.1 (Lollipop)
Display
Screen Size 5.7 inches 4.8 inches
Screen Resolution 720 x 1280 pixels 540 x 960 pixels
Screen Type IPS LCD capacitive touchscreen, 16M colors TFT capacitive touchscreen, 16M colors
Screen Protection Corning Gorilla Glass 3 Corning Gorilla Glass 3
Memory
Internal Memory 8 GB 8 GB
RAM 1 GB RAM 1 GB RAM
Card Slot microSD, up to 128 GB microSD, up to 32 GB (dedicated slot)
Performance
Processor Quad-core 1.2 GHz Cortex-A7 Quad-core 1.2 GHz Cortex-A7
GPU Adreno 305 Adreno 305
Battery
Type Li-Ion 3000 mAh battery Non-removable Li-Ion 2300 mAh battery
Camera
Front Camera 5 MP VGA
Front Flash Light
Front Video Recording 480p
Back Flash Light Yes
Back Camera 13 MP 8 MP
Back Video Recording 1080p@30fps, HDR
Connectivity
Bluetooth Yes Yes
3G Yes Yes
4G/LTE
Radio FM radio FM radio, RDS
WiFi Yes Yes
NFC Yes Yes