Microsoft's Phil Spencer said that the Pro Controller shared many similarities with the current Xbox pad, and that the system would feel familiar to Xbox users.
"Their Pro Controller makes a lot of sense with the platform they've built. They are building a platform that is effectively a 360 when you think of graphical capability," Spencer told Games Industry International.
"Now they are really making an on-ramp for the back catalogue of games that are on 360. It is easy for those games to move over to the Wii U.
"They've moved the buttons around, and they've made a controller that feels familiar for 360 gamers, so I get why they are putting those pieces together."
Spencer's comments come after Nintendo's David Yarnton previously distanced the Wii U from Xbox SmartGlass, telling Digital Spy that Microsoft's tablet experience wasn't built from the ground up.
> Read our hands-on with Nintendo's Wii U launch line-up
The words were echoed by Nintendo boss Satoru Iwata, who claimed that SmartGlass doesn't have the same capabilities as the Wii U.
The Wii U received a full specs and launch game list at E3 2012, and showed off a revamped Gamepad with analogue sticks and near field technology.
Watch a video of the Wii U Gamepad at E3 below: