Malik Willis has tremendous elusiveness and a rocket arm. He's neither as big, nor as physical as Allen but he's very quick and his arm is excellent.
Watch this play
Willis fakes a defender in his backfield, breaks a tackle from the same guy, rolls out, and then casually flicks one on the run that travels about 40 yards in the air right into the basket of the receivers' hands.
Obviously there are differences but Malik Willis is a very talented player. It takes more than talent to succeed as an NFL QB and I have no idea if he can, but the ceiling is very high for him.