MTF Charts 17-35 and Zeiss 21mm.
Actually, for once (LOL), I'd agree with you.
But the reality is that nobody has run "with lens" (as opposed to theoretical) MTF charts (meaning, as you say, without body) on these two lenses at a full range of apertures (as opposed to just wide open), and thus, since the OP seems to be "objective test" obsessed, the best I feel he will be able to do is use the D3X based tests with the two lenses on various sites to get a feel for things.
(I also would say he's better served if he could rent the two)
|Black on White by RaVN11|
|Hummingbird and Bee by dibilio57|
from A Big Year - birds
|xheneta iseni _for DPReview by Mike Slade|
from - My Fair Lady - (Portraits in Full Colours Only + A Border)