[obican]

People claim better "pixel quality", which means better tonality, color transitions and such. I have no idea though, I haven't shot with a MF digital, ever. I do know however, with the right lens system, you can't really tell the difference between APS-C and FF if the both sensors are more or less from the same era, even in pixel level. Most of the difference people think comes from larger pixels might as well be coming from better A/D converters, 16 bit pipeline etc.