Don't know, it can go either way but the gap won't be big regardless of who takes it.
@raygun
NA is currently where the war is at so I disagree with those who thinks the thread is pointless.
It is not quite the same as asking "Will PS3 outsell x360 in Japan or Europe this month?".
Currently PS3 has those areas locked down that is why regardless of what happens in the US PS3 will win by an impressive margin worldwide.
PS3 is currently putting up a much better fight against x360 in NA than x360 is against PS3 in the rest of the world.
That's why it's interesting.