I am having a really hard time seeing a difference in the quality of the files the 50C produces versus other Sony-made sensors (that are small). Yes due to the larger sensor, the depth of field is different, but it doesn't seem to have the color rendering differences (for better or worse) of the CCD backs.
Jhon, You are right, substantially there are no particular difference except a slight better performances at high iso (3200-6400) because the pixel are little larger.
For the color there are many debates about the performance, but practically the 50c color is well calibrated, and I didn't see differences between CCD.
One thing that I have to train about is the different exposure and the recovery. This new back is ok but it has a different Dynamic range... I'have see for example the over exposed portion of the Image are more difficult to recover than CCD, but the underexposed one have less noise and far better than CCD... So I'm trying to underexpose a little than before to gain advantage of the better Dynamic range.
Finally the larger sensor, offcourse it has a different DOF, but it's not all, it is a part of a complete system that in case of Hasselblad is very strong with options like T&S and top level lenses and any sort of accessories difficult, or impossible to find today in other systems.
The main reason for me to switch to 50c was the improvement of the usability of the system that I allready own, But, If I didn't allready had all this H-lenses system, options, etc... probably I wouldn't buy anything !
Domenico.