Maybe not a lot.

Showboat documents look neater if there are single one-line commands that do something useful. Dumping a full Playwright script into a cell is less readable.

Showboat also has a special feature where you can embed an image directly in the document by running:

  showboat image doc.md 'rodney screenshot'

It may well turn out that Rodney is unnecessary and people find better patterns using Showboat with existing tools like playwright-cli - in which case it won't matter because Showboat and Rodney aren't coupled to each other at all.

Showboat is definitely the more significant of the two projects.