NSMBWii vs GT5 (AKA I just made a bet, tell me if I'm an idiot)

[TWRoO]

Bundles aside... New Super Mario Bros should win.

If one is heavily bundled but not the other, then it would probably win for the first 26 weeks, but long term NSMB will likely beat GT5 even if it is bundled.

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I'm not certain, but IMO your side of the bet has the upper hand.