I believe that from June onwards Wii U competes with XO.
I think Wii U don't sell less of 50,000 and have constancy of 60,000.
XO less of 30,000 before price drop, +100,000 after price drop for 1 month, and after have constancy of 80,000, and don't sell less of 70,000.
From September, XO coming in other places, and i thin after the boots, have costance of 85,000, and don't sell less of 75,000.
But on Chrismas Wii U will win.