We know that its not fair to compare a M4/3 sensor camera with a Fullframe sensor camera, but recently a comparison done by camerazone shows that Panasonic GH4 is a better option for videoshooters compared to (see the test here),
So the big question is Will GH4 also give better performance during still shots? and the answer is NO… take a look at the test below.. the image samples of Canon 5D Mark III look impressive even at High ISO images when compared to Panasonic GH4.
We can clearly see the amount of details available in Canon 5D Mark III DSLR, no doubt that 5D Mark III is best still shooting camera compared to Panasonic GH4.
Buy Canon 5D Mark III From Amazon|| Buy Panasonic GH4 at Amazon| from B&H