People are being ridiculous. Comparing this guy to Amauri? Amauri was in his mid-20s already, coming off one half-decent season, and was more a poacher. Iturbe is young, but he's basically a brainless motor, with poor touch, poor dribbling. He's got a ton of pace, and works hard, and has a half-decent shot. Neither are or were technically gifted players.
Dybala is extremely talented, very technically skilled. He has fantastic dribbling and close ball control. Has very good finishing. Very good passing. Good pace, good quickness, good vision. He is nothing like the players being mentioned. He's about as close to a guarantee as you can get with a 21 year old.