InstallAware

Could someone expand on the differences between Developer and Studio Edition? Below are the areas I am interested in understanding more. Assume I know very little about installer technology or MSI. We are currently getting the Developer Edition, but I don't want to exclude Studio Edition if it is something we may need. Thanks.

Compiler Directives (Letting you build multiple setup releases from a single source project without complex automation)
Automation Interface
Automatic Variable Passing to and from script
Web Based Automation Interface

Automation Interface:
http://www.installaware.com/forum/viewt ... abdc188004

Compiler Directives:
Web Based Automation Interface:
http://www.installaware.com/forum/viewt ... 3cdf273f80

Automatic Variable Passing to and from script:
Refers to the capability of GUI controls to "receive information from" and "write values to" variables. This behavior is controlled by the interface that appears after double-clicking on a control: