What is the different between these two Eobjects generated from the same resource

Question

I don't understand why there are two different EObjects that (for me) should mean the same thing

var script1 = resource.getContents().get(0) as Script

var script2 = resource.parseResult.rootASTElement as Script

They seem to contain different information and I don't see why that would be.(yeah they come from different places) but more importantly I don't see why I'm there are two ways of getting (different) Script implementations (from the same sourcecode / resource).

script1 gets passed to the infererer. Why not script2?

Answer 1

The model inference is triggered by the invocation of #getContents. Besides from that, both variables should point to the very same instance.