If we look at things a little more logical, MS and Sony can only sell the consoles that they can make. BOTH consoles started production around the same time and BOTH consoles will have the similar resources to make the console. So it doesn't matter what markets you are in but overal sales. MS pumped more consoles in the US because that's where they will sell the most (a lot less demand in europe) while Sony has strong demand in both Europe and USA.
After 2 months it's stupid to compare any sales. We knew that Sony and MS have strong fanbases and will snap up the initial consoles made. The real test is how many weeks they will have high demand and what side will the neutrals and casuals will take. Early indications says that the PS4 will widen the gap in all terriotries once supply doesn't play a factor.