Well its pretty obvious because of GT's performance history it will outsell Forza lifetime, maybe in about 1 - 2 months. but this is not enough tbh, GT is up against GT4 and not even MW2 has sold 10m on the PS3, its also Sony's European flagship series, and only 2 PS3 games have sold over 3mil units in the EU, which is just over half of GT4s 6.5mil in the EU, so a seemingly improbable task, but i think if it moves consoles, it will happen.