Best way to understand API changes between releases or specific releases?

I’m looking for the best way to for example understand the API changes between 23R1 and 23R2.  The obvious answer is to deploy 23R2 to build place and then compare the OpenAPI spec between that and one of our other environments on 23R1.

Is there a better approach or something captured that helps customers understand the potential impacts to upgrading at a technical level?

Thanks,

Robert