Thanks for posting that picture. I hope this does not offend people, but having done various modification and rescuation efforts to a few masks and now scratch-building a Vader mask, when I now look at a Don Post Deluxe, I wonder what it would look like if I did some work to it to make it more symmetrical and such (kind of like my Darth Ugly project).
When I look at the GH ROTS, I can't help but notice how the eye "lenses" are part of the casting. The Don Post Deluxe's lenses have an acute "pinch" at a certain part of the lens, approx. 1.75" from the bridge of the nose. The cast lenses on the GH have the same pinch.
The work on the nose and the mouth also remind me of enhancements I've done to a Homer1138 "Stunt" helmet (which turns out to be a recast of the Rubie's Fiberglass Limited Edition).
I am not saying that my work is anywhere nearly as good as GhostHost's but I can only wonder if the Don Post has a more significant part in the offerings of well known vendors....