I almost want to say Ariza. Ariza let the ball flow in the triangle offense and I think Artest will hold on to it more. Ariza made huge defensive plays in the playoffs that helped Lakers win(see Denver series). Artest is the better player no doubt in my mind but Ariza just fit more in my opinion. However I think Artest will have a much better year than Ariza will in Houston because Houston is going to be hurting and without Kobe and company to spread the floor, Ariza won't have the open shots he had or the same looks he had with the Lakers.