Today the first session with the RZ67ProII with the Leaf.
I tested the 110mm f2.8 and the 180mm and must say that although focus with the standard screen is a bitch I was wildly surprised with the sharpness this system delivers....
A 100% crop straight out of the cam (very, very slightly sharpenend by photoshop):

Maybe someone can add to my experience.
I know the 645 by heart, I expected the RZ67ProII to be equal or little less.
At the moment however I have changed my opinion, it SEEMS that the RZ lenses have slightly better contrast and better blackrendition giving the shots a more real look and more contrasty.
I should have to shoot the two next to each other to be 100% sure, but what I see now I prefer the RZ above the 645, I wonder if more people have experience with both.