Hi (App Engine PM here). Yes both libraries connect to the same database (Cloud Datastore). cloud.google.com/go/datastore is preferred as it uses the Cloud Data

Hi (App Engine PM here). Yes both libraries connect to the same database (Cloud Datastore). cloud.google.com/go/datastore is preferred as it uses the Cloud Datastore API instead of the App Engine specific API, so your code will be portable. You are right that the devil is in the details, and there might be some slight serialization differences. I cannot find an exact list. Feel free to post here if you need more help.