Aguero is the Premier League's joint leading scorer with eight goals this season, and the City full-back feels that his teammate is one of the best forwards in the game.
"He's one of those seven or eight top strikers in the world," Zabaleta told Goal.com.
"Kun (Aguero) is a very decisive player and has the capacity to change speed with the ball and start and stop with incredible velocity. He has an impressive balance in his lower body, speed to slalom and it is incredible how he finishes.
"Every year, we see some surprising goals. It's hard to see a striker with that capacity because there are some guys like Lionel Messi or Angel Di Maria that are very fast and can change the game but none like Kun in what he does best."
Aguero scored twice as City qualified for the Champions League knockout stages on
Tuesday evening with a 5-2 win against CKSA Moscow.