I did a bit more searching and came across this thread on OSW:
https://www.onesixthwarriors.com/forum/sixth-scale-action-figure-news-reviews-and-discussion-/862940-cross-brand-colour-matching-tbleague-jiaou-doll-very-cool-kumik-heads.html
The focus is on colour-matching, which is not really an issue for me since most of the figures I'm trying to create are SW aliens and thus will need to be coloured with oil pastels anyway, but there are nonetheless some useful comparison pics including VeryCool, Jiaou, and Tbleague bodies.
Hope it's ok to leave this here, in case anyone else finds it helpful as well.
https://www.onesixthwarriors.com/forum/sixth-scale-action-figure-news-reviews-and-discussion-/862940-cross-brand-colour-matching-tbleague-jiaou-doll-very-cool-kumik-heads.html
The focus is on colour-matching, which is not really an issue for me since most of the figures I'm trying to create are SW aliens and thus will need to be coloured with oil pastels anyway, but there are nonetheless some useful comparison pics including VeryCool, Jiaou, and Tbleague bodies.
Hope it's ok to leave this here, in case anyone else finds it helpful as well.