That is the opinion of former Chelsea and England star Joe Cole.
Kovacic is currently on a season-long loan to Chelsea from Real Madrid as part of the deal that saw Thibaut Courtois head in the opposite direction.
The Croatia international has been in and out of the Blues starting XI so far, starting six Premier League games and coming on as a substitute in another three.
But he has impressed Cole in the appearances he has made for his former side.
Cole claims Kovacic brings something to the Chelsea midfield that no other players in the squad have.
And he says the ability to drive forward is why he has featured a lot more this season than two-time Premier League winner Fabregas.
“I think he’s different class,” Cole said of Kovacic on BT Sport.
“We know he isn’t a prolific goalscorer from midfield but when you watch him closely what he does is he drives with the ball.
“Straight away that’s unnerving the (opposition) back four because he’s got that ability to just ghost past players.
“Cesc Fabregas is a great player but what he gives Chelsea on top of what Cesc can’t do is he can drive and take players out of the game from a central midfield position.
“It allows space then for the Willians, the Eden Hazards and the Pedros to receive the ball.
“I think he’s vital for the way Chelsea want to play.
“He would like to score more goals from midfield I’m sure.
“He’ll be one of those players I think when he’s not there, that’s when you’re not going to notice him.
“He drives and links the play from the defence to the attack so well.”
Cole was speaking ahead of Chelsea’s Europa League clash away to BATE Borisov on Thursday, where Kovacic was named on the bench.
The midfielder came on after 64 minutes, replacing Ruben Loftus-Cheek.