Wii U. At this pace, it would take years for the One to outsell the Wii U, and at this pace (roughly 3.8 million units sold last year), the Wii U should reach ten million within a year or so. Plus, the Wii U has more hardware selling titles coming out this year with Mario Kart and Smash (as opposed to X-Box One, which only has Titanfall, and that's not even exclusive to the X-Box brand).
X-Box One will probably outsell the Wii U at some point, but it'll be years down the road, and well after both sides reach 10 million.









