Sonys lineup is 4 games
Ratchet 7
Uncharted 2
Heavy Rain
Mag
360s is currently
Halo 3 ODST
Forza 3
*Plus any number of PC/360 releases (SC: Conviction, Alan Wake, KUFii: Dominion)
We already know Halo and Forza will be bigger sellers than any game on the PS3 list, so really all it needs is a couple of filler titles and 360 would win by default.