What I see here is a full frame Nikon for $5000 doing better at high Iso than a full frame Canon for $2200.
The other Nikons are “DX”.
I’m not in it to play fan boy for Canon - just that in certain segments they have a better camera. Nikon is catching up NOW - with D700 - but a few years ago you could pick up a full frame 5D for $1,000 lightly used. 5D was released 5 years ago.
otherwise - to me - both are a toss up - lenses drive decision anyway.
Similarly - Canon 50mm 1.8 is like $90. Nikon equiv is like $160 I think.
For me - personally - I can’t afford to play “who has the best camera”. It is a value judgement. So the comp is “lightly used Canon 5D vs new Nikon D90”. Plus - I shoot wide angle and low light ... etc.
Similarly - G9 vs ? P5100?