Highly debatable. While Amazon is more likely to be on the shit-list of Joe Public, in technical circles it comes down to AWS vs MS. Frankly if MS hadn't bought GitHub to distract magpie developers, there would be no contest.
Amazon has the lowest hiring bar because of high turnover. AWS vs Azure is besides the point.
Having worked for both, I would dispute the hiring bar point - but I'm sure it is team dependent.