Taarabt played with the Italian at AC Milan last season.
He told The Sun on Sunday: "I think he is coming to show he has grown up and that he is mature now.
"The team is young and, with someone like Steven Gerrard playing with him, he will get his head down and work hard.
"If they get 20 goals from Mario and 20 from Daniel Sturridge, they'll win the league."
"He is a different player to Suarez, who is a fantastic player, but his culture is to work hard and chase people. Mario is not like him.
"Mario is more in the style of Zlatan Ibrahimovic. They know they have ability and can win the game. Suarez has that as well so in England he was perfect."
For the big stories and the banter follow us on Twitter: @tribalfootball