Pretty sure the NA EU numbers are higher for PS4. Pretty sure vgc just took the gap between what MC reported for Japan and made the difference = name numbers. Sony said it reached 6 mil. They did no say exactly 6 mil in sales.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut