Hi Deano2

Classes and Projects are definitely similar in Quickbooks, however, the intent of them is slightly different.

Classes are generally for categorizing business departments or different services your business may provide. 

Projects are for tracking and analyzing the profitability of a job. If you have a project-based business such as contracting, interior design or consulting this means projects can vary widely in scope and complexity.

The Projects feature lets you organize all the components of one job - like sales, expenses, and timesheets - in one place, making it easier to track individual projects or jobs.  

For your above scenario then Projects would work perfectly:) 

Cheers