AppSoftware Suites is just the contents from Add/Remove Programs so it is limited by what is reported there.
Packages is physical file scanning and Product Suites is used by SLM to try to identify installed products.
MarXtar Ltd/MarXtar Corporation
LANDesk Expert Solution Provider
The One-Stop Shop for LANDesk Enhancements
Update - New Stand-Alone State Notifier Console for Service Desk Operators
Update - State Notifier now detects machine and user Idle states
Update - WoW & State Notifier now integrate for even more functionality