Assassin's Creed II and Left 4 Dead 2 almost here

Assassin's Creed II and Left 4 Dead 2 - both of the year's most anticipated sequels - are only two days away from being launched together. Fans of both titles will undoubtedly be lined up on November 17th, 2009 to receive these games, so the real question is which title will outsell the other. My money is on Valve's Left 4 Dead 2 but Ubisoft's Assassin's Creed II also looks impressive. Comment on which one you think will win.