Status-aware comparison

Compare up to three catalog entries

Compare up to three concepts by outcome, scope, and differentiators. Future Concepts remain non-purchasable unless a separate release is verified.

The three-entry limit keeps phone and desktop comparisons readable.

Comparison is stored only in this browser unless you copy a public-ID share link. You can also snapshot the current public IDs as a browser-local research set and reopen it later from My Universe.