I'm trying to compare these to the ones on the Blitzway website with the existing prototypes (for example:
https://blitzway.com/products/raymond-stantz-ghostbusters-product?_pos=1&_sid=6655bcdc7&_ss=r), and there do seem to be some other differences, though it's hard to know for sure without more high quality pics. Winston's mouth seems different (more open now), but his eyebrows seem the same. Egon's eyes seem less furrowed, and his mouth looks more neutral. The Venkman looks more like the production sculpt than the previous prototype. Ray seems less focused and aggressive. Maybe these are all completely new.