Kean struck the winner against Empoli on Saturday.
“Kean attacks the space and pushes forward in the most extraordinary way," Chiellini said.
“Kean has more physicality than Mario (Balotelli). His goal against Empoli was almost in the (David) Trezeguet style. Mario might have more of an eye for goal, but Kean has a better shot from distance and attacks the space a lot more.
“He just has to carry on doing what he's doing this season, work hard and ensure he is ready when called upon. There are few Coaches who'd be able to help his progress more than Massimiliano Allegri."