Microsoft shipped 6.6 million Xbox consoles – Xbox One and Xbox 360 combined – in the final quarter of 2014 ending December 31.
We also know that Xbox One was the best-selling console in the US in both November and December, but don't have actual sales figures.
By comparison PS4 sold 4.1 million units between November 23 and January 4. It's difficult to compare the two platforms when one is quoting shipped and the other sold.
