Dell has just released the XPS 15Z and it’s not very far from having fallen on its face. They went against the 15″ Macbook Pro’s design and the 13″ Macbook Pro’s performance, and have fallen between the two. And on the face, of course. What does a MacBook Pro have the Dell does not? Build quality for starters. You don’t have to grab a Dell XPS 15Z and start twisting…