There is no difference between AutoCAD and ADT it's all about what you want to use it for. If you don't use the ADT commands then you wouldn't know the difference. ie. ADT is just Plain Jane AutoCAD with a few bonus features that you can decide to use or not use.
ADT has all the capabilities of normal AutoCAD. If you don't want to use ADT commands, then ignore that they exist.
If you want to setup some of your basic toolbars for 2D drawing, do the following.
From pulldown menu go to: View/Toolbars
Select: Toolbar (tab)
Select:ACAD (menu)
Check: Draw, Inquiry, Modify, Object Properties, Shade, Standard Toolbar