The pair are early contenders for this season's Golden Boot.
Mitrovic told TV 2, "I learn from him. The movements, how he creates space and uses his speed. He can score with his right, left and is a great finisher. He is a dangerous player who scores goals if he gets the chance.
"If you compare, we are completely different. He will not only be one of the Premier League's best, but one of the world's best."
Mitrovic finished the winner last night as he scored in Serbia's defeat of Haaland's Norway in their Nations League tie.