What will have higher sales ? Forza 3 or Killzone 2?

[JEDE3]

http://vgchartz.com/swlaunch.php?reg1=All&game1=Forza+Motorsport+2+-+X360&reg2=All&game2=Killzone+2+-+PS3&reg3=All&game3=&weeks=100

Hm.... wonder what that huge increase in week 21 is... could that possibly be bundles at the million mark?