The Scrutiny licence is the full per-user licence for the current version, 7.3.1, usually $115.
Improvements since 7.3 include
- Improved insecure content reporting - the table now shows all issues - secure pages which contain links to insecure ones, and pages with mixed content.
- Manage the autosaved data and selectively trash what you don't need.
- see all images with their file size
- Other small fixes and enhancements