OK, jokes aside, I did another test today at the same place. I was a little apprehensive going to the same place again, but you got to do what you got to do! Today it's the Carl Zeiss Planar 50mm f1.4 QBM vs. EL-Nikkor 50mm f2.8.
Colour differences aside, it's tough to see much difference in sharpness, although the EL-Nikkor still wins wide open, against the Planar two stops down, in terms of absolute sharpness. It's a very close call though. Unless you look at them at 100%, you won't find differences in sharpness. I do prefer the Planar's way of rendering the picture more.
EL-Nikkor 50mm f2.8 @ f2.8. Click to see larger.
Rollei QBM Carl Zeiss Planar 50mm f1.4 @ f2.8. Click to see larger.