We don't have two different engines in the package. So when you get different results that depend on how you start it, check the command line parameters. You probably have entered different parameters in SED and WED.

In modern 3D games, antialising must be handled by the application. So, use "Application Controlled" unless you have an old 3D app that does not support antialiasing. For A7, it's always "Application Controlled".