Toggle between two versions of online UI software documentation?

I need to document two versions of an extensive user interface software for a complex management system. The UI’s are 80-90% similar, 10-20% different. To document both would be a lot of duplication; to call out the differences is likely to be confusing.

Question: Is there a way create a single online manual and tag the sections such that an end user can click on a version (e.g., Version A, Version B) and Confluence will auto-sort the sections that cover the selected version?

You could try Scroll Versions by K15T.

Thanks for the tip! I’ll look into it.