After some time, here are my observations from the calibration work Chad did.
SDR - He definitely improved, even though the HDR C6 I have with Calman had SDR dE about 3 or less, I only used slight 2pt work. He went into 10pt on Cinema Pro and also fixed my Gamma. SDR looks even richer, and I had a little too much red in my white balance results.
HDR - The Sony's (and this is a GREAT feature) will map over from SDR cal to HDR, so if you cal Cinema Pro in SDR, just leave it in that mode and watch away when it flips to HDR. I had also been told by other professionals that Cinema Pro would be the best choice for HDR due to its tone mapping. When Chad finished his cal, he tested HDR with it mapped from SDR, and it was really good. He then checked Custom vs Home, and we found Custom to produce better on patterns, so he calibrated Custom in HDR mode. Results were outstanding by the charts.
After some usage, and going back and forth, I have been using Cinema Pro for everything, it just looks better to my eyes. Now I can't comment on accuracy, end of the day, use what you like. But I know, either way, both modes are calibrated, I just prefer Cinema Pro.
DV - If Sony goes the same route, and say you are in SDR Cinema Pro, and it gets a DV feed and then heads into Cinema Pro DV, and maps from the SDR white balance, this will be GREAT for Sony users.