My prediction is that by 2020 Netflix will move a significant portion of their IT to Google Cloud. Why? Most of their architecture is microservices / linux containers / serverless, and Google is simply way better positioned there (with Kubernetes as their crown jewel). They will eventually win. Source: no source, just my "expert" opinion (6 years at AWS, 2 at VMware's cloud, currently CEO at a startup).
AWS is catching up as far as Kubernetes support. I might agree that GCP is better positioned for some of that architecture, but they are still comparable. There are also some advantages to AWS. For example, I think that their RDS product is still more mature than Google Cloud SQL. It's all trade-offs.
To drive the second point home, GCP recently released VPC Flow Logs, while AWS has had it for a good while now.