Do you think if david de gea joins man utd, then he could be better than casillas in the future?

i'm not sure is it confirmed or his on his way to man utd, so do you think so, after all, casillas also debut at a young age, same gos for de gea and him at man utd would definitely help him (not saying atletico madrid or other clubs won't) but do you think de gea could be the next casillas or better?