Check the VGC sales numbers on the games week by week:
Resistance 2:
http://www.vgchartz.com/games/game.php?id=15255®ion=All
Killzone 2:
http://www.vgchartz.com/games/game.php?id=12253®ion=All
It looks like, around the 4th week or so in, that Resistance 2 had been selling better on a week by week basis than the Killzone 2. Killzone 2 got a nice jump, but then the rate of decline was larger.
Anyone want comment here on there?







