Here's a material answer - https://cloud.google.com/docs/google-cloud-platform-for-aws-...
In short, Google has parity with AWS on many fronts, and exceeds AWS on many others. Only material AWS advantage at this point is full IAM. Biggest thing you gotta remember is AWS is stuck in "VM" world and only slightly deviates from that. Google's advantage is in its fully managed services, which AWS does poorly (don't tell me Redshift is "fully managed").
Google has Bigtable, which AWS has no competitor for. Google's Pubsub is vastly superior to SQS. Google doesn't need Firehose because Google's services scale to Firehose levels without needing a new product and a new price. Google has Zync transcoder service.
Google has BigQuery, which is vastly superior to Redshift in price, performance, scale, and manageability. Google has Dataflow, which AWS has no competitor for.
Even for VMs, Google offers better networking, faster disks, more reliability (live migration), better load balancer, etc.
And to put the cherry on top, Google's no-committment, no-contract price is only beat if you lock yourself into AWS's 3-year contract.
(disclaimer: work on BigQuery)