UpsertResponse response updated or not?

Good afternoon,

I´ve been testing the UpsertRequest for few weeks with good results, building a tiny framework around it.

One thing which bothers me is when I get a response from "UpsertResponse" I can only see if the record was created or not.
What about if it was updated or not?

Let´s say if I want to log every record via UpsertRequest and only log out each create/update, response.RecordCreated gives me true when a record has been created (great!) but how can I check whether is has been updated?

I´d like to avoid, querying CRM for all the data which I tried Upserting and check the datestamp afterwards if something has been modified.

Any clues?