I have viewed pics of this mask in the Gallery section and am thinking about purchasing one from Nik further down the road. Does anyone know if there are any major differences sculpt-wise or is it mainly the hair and finishing that sets it apart from the 2K? It is primarily the sculpt aspect that will help determine if I get one or not. But then again I just may purchase it anyway 
(Sorry about the babbling). By the way, I have no negative feelings about this topic, have the upmost respect for Nik’s work and just would like some input. Thank you for your time everyone.
I also love this mask! and thinking of getting one myself. But I’d love to see more pictures (hint hint guys lol)
From what Ive gathered, I think The classic 75/78 is Niks first attempt at the 2000 mask, but it didnt turn out how he wanted. So He gave it another go. Ive also heard that he sculpted both masks-with the intention of making the classic mask a lower priced and availble mask. But Nik has said that the Classic mask is very similar and its mainly the hair and finishing work that sets these masks aside. but there both two different sculpts.
Hope that helps.