As always, very cool to see your boards with screen caps alongside! I find it interesting, too, how you drew Rex minus his goggles while disguised as a Providence Pawn and then they were included as part of the actual animation.
I guess the goggles were added later by the revisionist artist. It doesn't really make sense to wear goggles under a mask but maybe they thought it was integral to his character. Six wears his glasses under his mask too. Weird. Also notice the small part where Rex and Jungle Cat duck the Black Pawns. That was changed.
I think noticed less with Six because he hardly ever removes those dang sunglasses. He did, after all, wear them under his scuba gear in "Waste Land." They're practically a part of his face. XD I could see the argument for leaving the goggles on Rex, though. IMO, he looks better with than without, anyway.
Ah, yeah, I see what you mean with the shifted angle.