Olympus PEN E-P5 VS Sony Alpha NEX-6

Olympus E-P5 inherits the 16 Megapixel sensor of the OM-D E-M5, a four Megapixel upgrade over the earlier E-P3, although revealingly no higher than any other model using the Micro Four Thirds standard, nor does it eliminate the low pass filter or employ a different color filter array as some rival systems have tried with success.

It also inherits the E-M5's built-in five-axis stabilization which works with any lens you attach, a key benefit of Olympus cameras enjoy over most of the competition including Panasonic's own Micro Four Thirds bodies to date. Another key feature is built-in Wifi for wireless remote control or image transfer, although it doesn't have the NFC for easy Wifi setup like the Panasonic Lumix GF6.

The Sony Alpha NEX-6 is the latest addition to the NEX range of mirrorless compact system cameras. Announced in September 2012 alongside the more consumer-orientated NEX-5R, the NEX-6 sits just below the Flagship NEX-7 in the product line-up and shares the same body shape and styling as well as many of the flagship model's features, though not its 24 Megapixel sensor. The NEX-6, like the NEX-5R has a 16.1 Megapixel sensor with on-board phase-detection pixels providing a hybrid AF system similar to that used by Fujifilm, Nikon and Canon.

Sensor: Sony NEX 6 gives you bigger sensor with much larger photodiode compared to Olympus E-P5, so its no doubt that the NEX 6 will give you better low-light result and more dynamic range.

AF system: Olympus uses Frequency Acceleration Sensor Technology (F.A.S.T.) developed by Olympus few years back,  Olympus E-P3 and OMD E-M5 camera uses the same technology  (F.A.S.T System). The AF speed of Frequency Acceleration Sensor Technology based camera are blazing fast, on the other hand Sony NEX 6 uses Hybrid AF system that combines Phase and Contrast detect method, NEX 6 have Phase AF pixels active during still and video mode, so both camera gives you the most advance AF system available today.

Based on different lighting / test condition, Hybrid AF system (Phase+Contrast) is more recommended over contrast based AF system.

NEX 6 also offers bit fast continuous shooting speed compared to Olympus E-P5.

Image Stabilization: Olympus features built-in image stabilization, No IS available in NEX 6.

Video: Sony NEX 6 can capture Full HD video @ 60fps, Olympus E-P5 limited to 30 fps only at Full HD mode.

Display: Olympus E-P5 features high resolution touch display, no touch display available in NEX 6