One question that's come up before is how much of the Schneider look the phase mamiya lenses with that label really have. My understanding is that Schneider were brought in to consult on the design, but did not do the design themselves nor manufacturer these lenses. I wish I had made some comparison tests wide open when I had both the phase DF body and my AFi-ii 12 so I could post them here to illustrate, but the look wide open is not the same between the schneider phase and the schneider rollei (regardless of how much involvement schneider had in the lenses for the DF body).
Fred, have you ever used the Schneider Rollei MF fast lenses such as the 50/2.8, 80/2, 180/2.8 ? I think you'd like these lenses a LOT! And another MF lens for HB and Rollei that you might like is the zeiss 110/2....