It seems as you can accept no answer that does not come up with the Canon.
I find it odd that you think that. . Although I use Canon gear, I am not all "pro-canon". . I have been frustrated with Canon in the past, because of some of the limitations that their camera bodies have, and I expect to continue to be frustrated with them into the near future.
The lack of a truly silent shutter is a very real problem in Canon's lineup. . The lack of focus peaking via a touchscreen is also very discouraging. . These things would make a very positive difference in the images that I would be able to capture, and currently Canon offers no suitable answer to these needs.
The high ISO performance and dynamic range in Canon's current DSLRs is plenty good enough for my needs - more than good enough, in fact. . The practical differences between the D850 and the 5D4, in these areas, is so minute that it doesn't make any difference at all. . These things just aren't important factors when choosing a camera body when the two bodies under consideration are so close to one another.
If the comments that I made in this post make you think that I am pro-Canon, then you have an inaccurate way of interpreting my statements.
All things considered, Canon offers an overall system that, at this time, is slightly better for my needs than either Nikon or Sony. . But I do not think that Canon's camera bodies are necessarily better than those made by Nikon or Sony. . All three systems have strengths, and all three have shortcomings.
When you consider the question that the OP asked in the initial post, you must first consider the overall system, not just the body. . If I find that the Canon system is a better fit for the kind of photography I do, then I will, of course, choose the Canon body, even if the Nikon equivalent body is better.
I'm not going to choose an entire system just because that system's camera bodies are better. . The body is actually a really small part of the overall system, and a not-too-important part, at that. . I currently have over $20,000 worth of photography gear that I use on a daily basis. . Only about $1200 of that $20,000 is in bodies (my 1D4 and my 50D backup). . The body just doesn't matter very much compared to everything else.