One of the interesting things about our metrics is its position-adjustment. Essentially, the things that big men do in the NBA are the things that are most important when it comes to winning: shooting efficiently, rebounding, not turning the ball over. But, of course, you cannot play five centers. Or, more accurately, part of the reason that centers tend to shoot more efficiently and grab rebounds is because they hang around near the basket a lot. And part of the reason they don't turn over the ball a lot is because unlike the point guard, they don't have to bring the ball up the court while one of the other team's quickest defenders hounds them.
This becomes a popular criticism of our metrics. "On paper", a team of Tyson Chandler, Omer Asik, Dwight Howard, Andre Drummond, and DeAndre Jordan would win like 75 games. Except, of course, they would lose a ton of them because none of those players would produce many wins playing point guard, and somebody has to bring the ball up. So the real question isn't "Which of these teams is better?"