It does seem a bit odd that, whereas the Mantis seems to be almost a direct 1 to 1 update, the Gorilla, while still looking very cool, does seem like a little more of a departure from the original look.
I don't mind the little details at all like the spikes or pipes on the head and arms or anything, it's more that the chest doesn't seem wide enough nor the legs as short as they should be to give it the same sort of "gorilla" appearance that was the reason for the original being named as it was. It's hard to tell how long the arms are though, since in most pics the legs are bent to some degree, and as I say I do still like it. It's just odd they they seem to have stuck incredibly faithfully to the design elements of a figure which you'd think might almost be harder or more elaborate and time-consuming to create with the Mantis Alien, but seemingly not take quite the same approach with this one.