What would happen if Gran turismo 5 and Halo 3 launched on the same day?

[bouzane]

Why would GT5 need to beat Halo 3's opening week, its sales dropped off rather quickly and weeks 2-52 matter in this. Here's a bet, GT5 first year of sales after launch will exceed those of Halo 3. IE GT5 YTD > Halo 3 YTD. Winner chooses the losers sig and avatar for a month.