I'll say one thing though.
The raised collarbones and the shape of the head look more like a "believable creature" than the neca.
As for the paint, it needs to be darkened or smoked over but it is actually a very nice paintjob. Lots of details and airbrushing that isn't there on the neca.
I think they're going for a hyper realistic look and that's why there's brown in it.
It is too much brown though.
As for the dome, the shape looks perfect on the top, the flare is much more 1979 accurate (pronounced) than on the neca, but where it joins the head it looks all weird. Also it looks like there too many tubes running along the head.
The neck is nice, not neccesarily stunt suit accurate but looks more believeable than a thin neck like on the movie suit and the neca.
The mouth is all wrong though, and the gums & teeth look wrong too.