The numbers of owned systems are pretty much equal. If ps3 didn't have Japan who are very loyal to their own companies there would be no comparison in sales figures.
Sony was the unrivaled leader in sales and marketshare last generation. They have been dead last this entire generation and only now have begun to catch up. I'd say going from first to last is a failure, but you ps3 stans like to ignore reality so I'm sure you'll come up with a reason as to why loosing sales and marketshare is a good thing