Here’s a handy chart outlining the new features of MAS 90 and MAS 200 4.x courtesy of Sage partner Faye Business Solutions of Woodland Hills California.
This two page PDF does a fantastic job of showing exactly what was added to each module in versions 4.0 to 4.4. Download and stash this one in your toolkit so the next time someone asks you what’s been added in differing versions you can provide them with this reference.