There is no specific feature I know of that does this currently, but it sounds like a good project.
While it takes a bit of manual work, you could leverage the following to do a reasonable job of comparing cluster configurations:
NOTE, the api version (/vxx/) that your CM version supports differs depending on the CM version itself.
To find out what the highest API version your CM supports:
This will print out cluster information including configuration.
You could automate this, integrate into versioning, etc.