[SteveSmith16384]

I'm not sure why you were using Inheritance in Godot? Just use the "gameobjects" paradigm as you did with Unity.

[IX-103]

If you need to customize the behavior of certain interactions (such as modifying physics with a specific type of object), you need to subclass since some behaviors are only available as overrideable functions, not as signals. Also the documentation tends to push this approach.