PS3 needed to have a better year than 360's to catch up. It outsold the 360 worldwide for awhile and is catching back up to about even right now. As long as the user bases maintain the same distance I don't expect it to be an issue. Most third party games will be on both systems.
If PS3 catches up in the US, though, the PS3 will have an advantage going forward. We'll see what happens.
But comparing the first years is pointless now.







