I think the 8 human figures was a typo or something. There are 2, Ryan and Alyson, with 4 ethnic face morphs each, and four ethnic texture sets each, just as you suggest.

There are also low res and high res versions of each.

There are other new figures, such as Battle Bob, a dog, Creech and the Mecha, but they're not human.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)