Robert Lewandowski had Barca ahead before Victor Osimhen's equaliser in the first-leg of their Champions League round 16 tie.
Gundogan later said: "Both are great strikers, they know where the goal is and how to score, they are good at finishing.
Advertisement
Advertisement
"I think Robert adapts well to our game, he knows how to control the ball in difficult conditions.
"Osimhen knows how to be aggressive when he has a player on him, but also if they have different qualities they are two world-class footballers."