One - they both define Europe differently and I see no indication either is adjusting their numbers to account for that...
Two - even if 360 is still ahead by that amount given its been out nearly twice as long in Europe and has at least one extra holiday season under its belt I wouldn't be too excited by such a narrow lead if I was them
Three - handbags at dawn! And as ever no mention of Wii!
Try to be reasonable... its easier than you think...