The way we think about this is that there are basically two classes of cloud services: commodities and differentiated services. Commodities are storage/network/compute, and the big players are going to compete on price and quality on these for the foreseeable future (as with most commodities).
The differentiated services stuff is a bit more interesting. Different players have different strengths and weaknesses here - AWS has way, way better capabilities when it comes to administration and access control and identity management, for example (which is actually pretty important when trying to do this in a large org). The places were Google is strong (data platform) are the places that are most important for us as a business.
Compelling: dataproc+gcs, bigquery, pubsub, dataflow Made it safe: high-enough quality, cheap enough.
What more would you like to know?