If we look at the VGC WW data, the two are tracking very closely over the first 10 months:
http://vgchartz.com/hwcomps.php?cons1=X360®1=All&cons2=PS3®2=All&cons3=X360®3=All&align=1
Of course this is with the 360 having no real presence at all in Japan.
We grant the US to the 360 and, until the PS3 cuts price again, I see no reason why this will change.
http://vgchartz.com/hwcomps.php?cons1=X360®1=America&cons2=PS3®2=America&cons3=X360®3=America&weekly=1
Japan gets the PS3, but only marginally. The overall sales of both systems is anemic. However the PS3 at least has a chance of a comeback, though it will not be in time to save the holiday.
http://vgchartz.com/hwcomps.php?cons1=X360®1=Japan&cons2=PS3®2=Japan&cons3=X360®3=Japan&weekly=1
In the "other" markets, both systems track very closely in weekly sales.
http://vgchartz.com/hwcomps.php?cons1=X360®1=Total+Other&cons2=PS3®2=Total+Other&cons3=X360®3=Total+Other&weekly=1
I am guessing that the "other" markets are hardest to measure accurately, which puts this essentially a dead heat given margin of error and the short time that has passed since the PS3 launched.
Currently it looks to me like Sony's games are not coming through as expected, which, if reviews have ANY impact on sales, will hurt their holiday. That means 360 has to deliver its goods, preferably at a lower price. Bioshock was a great start, but Halo3 especially has to deliver, and then a third, non-shooter will need to excel to show the console has more than one dimension. But until Sony has something to offer I see no reason why MS won't continue to gobble away at it's market share.







