Torres simply doesn't have the offensive skill that Virtanen has. His hands are much worse, his shot is worse, he's not as fast, and he's not as dynamic.
Now about the size thing. He's only 18, he has a lot of room to grow more muscle. Maybe even grow taller. His dad looks like he's 6'3 or 6'4 and a lot of people grow between 18-21 so he could grow taller. Might be a bit of a long shot though.