Quoted FYI:
In looking at the HT vs. SSC heads, I would say that the SSC size looks more accurate. The HT head feels about 20% bigger overall, and sculpt-wise it just seems fatter somehow, like Yoda is a bit overweight. The HT sculpt detail and paint is astoundingly good (other than that red dirt wash) and is a MASSIVE improvement over SSC's soft detail and unsubtle lime-like green paint but the HT head does seem a bit too large for Yoda - and maybe a bit too big for the ears the head has (like proportionately, the ears should be a bit bigger or the head itself a bit smaller.)
I did manage to get the glued-on hair to a point where it looks okay in terms of the Yoda "messy hair" look, but it still isn't 100% due to the too-straight hairs (a bit of the "finger in power socket" look.) Will post pics later.
I also swapped the robe to a modded (hoodless) SSC Jedi master robe because it seems a better match and doesn't have the bathrobe look the HT one has. Out of all the 1/6 Yoda robes I've had (Medi, HT, SSC Mentor/ESB, SSC Master/Prequel, Hasbro) I think the SSC Master/Prequel one is the best fabric and drape, but you have to cut off the hood and mend it.