You've demonstrated that Nikon's 85/1.4, which is among Nikon's very best performing lenses even wide open, is sharper than Canon's 50/1.4, which is not a particularly sharp lens, particularly wide open. You make no mention of performing an AF microadjustment/fine tune, which can be critical for sharpness with fast primes shot wide open.
You've demonstrated that Canon's AWB is poor...something most of us know already (although it's better on the 1D X than any other Canon camera I've used).
I'm not convinced you've learned anything beyond the obvious...
1DX, 5D Mark III, 5D Mark II, 16-35mm f/4L, 24-70mm f/2.8L, 24-105mm f/4L, 70-200mm f/2.8L , 70-200mm f/2.8L IS II, 100-400mmf/4.0-5.6L, 50mm f/1.4, 85mm f/1.8, 85mm f/1.2L, 100mm f/2.8L, f 135mm f/2L, 580EX II, 600EX-RT