Upload & Sell: On
It's actually quite a bit different than the 35/2 ASPH, in my experience with the two lenses. The Zeiss lens has a flatter field and smoother bokeh, although it also has more distortion and LOCA potential.
Wide open, I agree, but even stopped down to just f/2.8, most of those differences disappear (except for the distortion, which I don't find all that troubling on either). And by f/4, most of the differences, in my opinion, were attributable to the differences between the M9 and RX handling.
I will say that my week with the camera while the owner was gone made me appreciate the idea of a fixed lens camera. Most of my complaints were ergonomic, as opposed to the M9, where most of my complaints center around the focusing system and MFD.