Which one will have higher lifetime sales?

NSMBU 10.5m

3D World-8.5m

3D world deserves to sell more. But NSMBU probably will :-/

NSMBU For sure.

3D World will have a stronger opening and will outsell NSMBU on a weekly basis for a little over a year. Around Holiday 2014, they will start to be roughly tied on a weekly basis. By the time Holiday 2015 rolls around, NSMBU will be showing off its stronger legs as 3D World begins to fall behind.

U will, its being bundled this xmas.

NSMBU will reach 15mil

NSMBU will sell more, but it doesn't deserve to.

I can actually see 3DW having an outside shot at selling more. It looks like a much more impressive game, while still being accessible. 3D could really hit a much bigger audience than the Galaxy games. At the same time, people seem a little tired of the NSMB series and its uninspired take on 2D Mario. So 3D could end up being a bigger hit.

Most likely though, 2D will be bundled more, and if Wii U sells a lot casual gamers and kids will almost always pick up 2D Mario. But this 3D version could steel that audience.

There is a release of a New Super Mario Bros U - Wii U bundle. So it will sell more than Supe Mario 3d World. Cocnerning quality, I can't give you my opinion for the moment :)

NSMBU is going to outsell 3D World for sure, as always. They are more accessible to people that are not gamers per se, But we might see some 3D World leap in sales for a few months.