Trying to decide between Canon and Nikon may seem like a no-brainer for many professionals with years of experience. For the most part, when a professional picks a certain camera manufacturer it's for the long term and they rarely switch. Previously the cost and time required to make the transition from one to another was simply not worth it, especially considering the fact that the differences in real-world use were mostly minimal. Recently, however, it seems the gap between Canon and Nikon seems to be growing with Nikon cameras being noticeably better. Jared Polin gives his thoughts on the current line up between Canon and Nikon.
Canon's mid to high-end cameras like the 5D Mark IV and the 6D Mark II don't seem to hold up very well against the Nikon D850 and possibly even the D500. Looking at the specs on paper it would seem Nikon has Canon beat. Polin does, however, go on to discuss the differences in lenses and the type of lenses available for both systems. Personally I do believe that Canon has the better and more effective glass, but, of course, that's still up for debate. Both flagship cameras are described as being very similar in the video, however, I do have to disagree on this point as I consider the 1DX II to be one of (if not) the best DSLR currently available. This discussion can go on and on, but this latest video from Polin may be helpful to anyone that's still undecided.