Barely any difference, I’d say maybe the 98 proto has a more defined shape?? U can see the lifecast form more on the 98. But detail wise and general sculpt wise, I think they are almost identical.
Basically what is said above. The 75k was (correct me if I’m wrong) Nik’s first ever retool of the 98 Proto after acquiring it. He had retooled parts of it/reshaped it it seems.
These masks are so close and so similar that it simply comes down to the finishing work. Basically if you have a 98 Proto finished by JC and a 75K finished by Joe Blow… the 98 Proto wins. And vice versa.
It doesn’t matter. All of NAG’s masks start looking the same after a while. NightmareUL, 75K, 98Proto, New mold/Old mold, Supreme, Shape78, Mint75, RareR…whatever. Can’t even tell them apart. You can post any one of those asking what it is, and I would just say “Fuck it, its a 75K”.