First off I do believe that the PS4 is in much higher demand and that is having a huge effect on sales. Also the demand for the Xbox One is lower in Europe so it would make sense that they are shipping less there.
However it has been confirmed that both Sony and MS are manufacturing 1 million consoles per month each. Notice how around 250,000 are sold by each other ever week. Then notice half the PS4's are sold in Europe and the US, and then most of the 250,000 Xbox Ones are sold in the US...







