I tried all three versions and the Wii U 3D is FAR supperior.
The Xbox 360 3D is very pixelated and very dark.
The PS3 was much less pixelated and overall enjoyable.
But the top/bottom in the Wii U version really blew me away. For me it's by far the best 3D experience on a console yet. On PS3 and Xbox360 it's just a 720p game and it's running on a even lower resolution when it is 3D.
Top/Bottom on the Wii U it's still 1920x540.
In a direct comparison the Wii U version is clearly much less pixelated and therefore much more enjoyable.