This impostor they got to play Sully in Uncharted 4:
I mean, you aren't going to confuse him when you hear Richard McGonagle's voice coming out of his mouth, but in terms of facial features that's a completely different person.
Well, he's older, but I get what you're saying. The graphics jump really does a lot here though; the sheer increase in detail makes them look different. I think that Nate and Elena have gone through more drastic changes though, Nate especially, just subtly.