Hold on, please do not say google cloud scales well, yes they do have services that make a ton of claims, but unlike AWS, things don't work as promised which is magnified by the fact that their support is way worse.

Additionally, Big Query is far more expensive than Athena, where you have to pay a huge premium on storage.

The biggest difference is that what amazon provides you in infrastructure, where as google provides you a platform. While app engine is certainly easier to use than elastic bean stalk, you have very little control over what is done in the background once you let google do its thing.