AIUI, Microsoft juices those numbers a bit by including Office365. Yes, it’s in the “cloud”, but it’s not exactly apples-to-apples with AWS.

It's comparable to WorkMail/WorkDocs. Sure, O365 is a little more complete, and, sure, MS has more of their cloud revenue in that area than AWS has in its comparable services, but almost any time you are comparing business in a category where each has multiple services there’ll be differences like that.

Does Google not include Google Apps or whatever they call their Office365 competitor in their number?