I have had both cameras for a bit now and have collected lots of RAW from both cameras and as I get time I process them and put them in correct folders.
I NEVER COME TO KNOW WHICH CAMERA TOOK WHICH PHOTO unless I check metadata.
My opinion: There is no difference in IQ. I may be wrong, but I would not pick either camera just for IQ. While shooting, it is a different story altogether.
Would love for someone to post photos and educate me. Not challenging, I want to learn.
i think you're correct sanj....i would say there is no discernible difference between the two in good light with nothing moving..imo.
but i think bdun was referring to higher iso shots....and I would agree with him, the 1dx is slightly better when working a raw image in post at higher iso.....imo.
this past winter i shot a lot of hockey, and spent considerable time trying to "work" the dark areas under hockey helmets so that i could see more and better face detail...the 1dx was slightly better than 5d3 for this at iso 1600 and up