The body of the car is lifting while the wing is pushing down. Notice how little the lift at the back is compared to the front. It just so happens that the sti wing combo is much better than the evo, to the point where the sti overcomes the body lift and creates total downforce. Of course you also need to consider the amount of drag that is created with that much downforce. So do say one is better is not technically correct. Horses for courses.