EMR is basically hosted Hadoop, which is an open source implementation of a system Google created and made famous.
Docker is based on cgroups, which was largely contributed by Google engineers. And anyone deploying docker for distributed systems will tell you that you need some kind of scheduler/orchestrator.
Amazon excels at packaging and bundling the work of others, and provides a fairly robust enterprise management layer on top of it. CloudFormation, for example, is much better than GCP’s Deployment Manager. Google is quickly catching up in the enterprise management space as well, as they take on larger customers who demand these abilities, but I still feel like AWS has a bit more capability there.
You probably should have listed Lambda, which was a nice idea out of AMZN.