[babo]

It depends on your state and needs. It's a no brainer if the majority of your customers are in a specific region where AWS has a nearby datacenter or when you need some specific service from AWS like DynamoDb, IAM, CloudFormation, ActiveDirectory, Workspaces etc.

GCE is preferred for any kind of big data or analytics scenario. It's a cheaper service with way better networking or disk io, fit's very well for an engineering oriented organisation. Per minute pricing or very fast scaling of the services are huge advantages.