Last year, we commissioned an independent 3rd-party vendor to prepare a whitepaper comparing GCP pricing with AWS: https://cloud.google.com/files/esg-whitepaper.pdf

We also have a handy guide for AWS professionals who are looking at Google's cloud: https://cloud.google.com/docs/google-cloud-platform-for-aws-...

[Disclosure, I work for GCP, but I love all TLAs equally]