yeah, same stuff. I suspect the colours will just be slightly different(read different, not better) with no improvement in sharpness(cannot imagine and have yet to see anything better then the current standard). In fact, I cannot see any difference in sharpness between the 4 element xenar and the 6 element planar unless you start shooting newspapers on a wide aperture and magnify the corners. On colours, the xenar exhibits much more vibrant colours than the planar which can be easily compensated through the use of different emulsion base to getting the colour-vibrancy you want. For normal shooting, I'd usually match a warm up filter on the xenar lens on Fuji Provia 100 film. I've tried Velvia on the Xenar lens and it turned out too gaudy for my preference.
and oh, the new rolleiflexes uses seiko shutters(after F model) which I find to be harder to trigger than the good old compur shutters.
