Specific information about the Blue Prism database tables beyond the entity relationship diagram available in SSMS is considered commercially sensitive information and is only available by requesting a version-specific Data Dictionary within a Product Support ticket. This documentation is intended only for existing customers and requires a Non-Disclosure Agreement (NDA) to be in place before it can be obtained.
Also, notable changes to the database are documented in each version's Release Notes, but this information provided is for reference purposes only and Blue Prism provides no guarantees that the database schema or structure will not change between database versions.
To help address your question directly though, you could open a Support Ticket requesting the Data Dictionary documentation for 7.0 and 7.3.x, and compare the changes between versions (if any) in notable tables used by your organization.
