The H40 mask is a tough one, I think with all the various sculpts being done, there's a lot of room for preference, and the mask itself looks different throughout the film.
For me, this is the sort of look I want in a collectible.
Then there's shots like this where it damn near looks like a clean '78.
While not perfect, I think NECA's prototype probably captured it best for a figure of any kind.
They really captured that distortion quality that shows the mask is aged.
To me, this one is a bit too smooth and perfect looking overall and feels a bit more like the mask's condition after 20 years, only halfway to aged.
This version looked more beaten up and worn, even if some of the overall forms needed work.
Then there's this one, which to me looks off in many ways, most of all the sculpts I've seen.
This is definitely one of the best ones.