According to the logic I've seen on this site:
The Wii U has a tri-core 1.2 Ghz CPU, and a single core GPU.
The PS Vita has a quad-core 2.0 Ghz CPU, and a quad-core GPU.
That means...
OMG, WII U LESS POWERFULZ THAN PS VITA CONFIRMEDZZZ!!! INSERT NAME OF 1993 FPS BY ID SOFTWARE HERE!!!