Both players scored in the 2-0 win on Sunday.
“He didn't just impress me, but the whole group," Insigne told Sky Sport Italia. “When he attacks it is devastating, as we saw today.
“He reminds me a bit of Cavani, for how he attacks the depth. He will give us a hand because he brings something different to me and Dries [Mertens], and his speed can be important.
“We told him to stay calm, he's young. He has potential and needs to grow, but we will help him."
He added: “We must be more clinical on the counterattack and it starts with me. The coach asked us to attack the area well.
“In the first half there were many crosses and only Mertens was in the area. In the second half, we did more and we won the game."