Full image for reference - 5D2 100 ISO, D800 50 ISO, f/8 - Zeiss 50 Makro-Planar on both cameras
For this image with identical shooting settings (f/8 - 0.6 sec) I got the same histogram with 50 ISO for the D800 and 100 ISO for the 5Dmk2. Don't know why...
De pictures told me, that the D800 has a better DR, i do use the S5pro with Nikon glass, the colors and the Dr ara great, in my opinion the best. Sharpnes good be better.
My experience with the 5Dmk2 is disapointing, because the colors, DR, exposure -under- and handling are much differend in according with the fuji. Lots of handling in the menu.