Barca host United defending a 1-0 lead for their quarterfinal tie.
"We'll see tomorrow how they set up," Ter Stegen said at a pre-match press conference. "The good thing is that we play differently to PSG.
"We're coming up against a hungry team.
"They've won games away from home and we don't have a very big advantage.
"We want to defend [our lead] and show that we are better. We need to play well tomorrow.
"They have very quick players. You always have to be aware, like we were [at Old Trafford].
"We want to go out and dominate the game, like always, but when we have to defend we have to do it like we did [at Old Trafford]."