Just from looking at the files:
- internal textures are bumped from 1024 to 2048
- external liveries are bumped from 2048 to 4096.
- added Aviators and Aviators Xbox liveries
I see no aviators livery in my game.
The enhanced folder has a flight_model.cfg with a couple of strange differences (in the fuel section) and a systems.cfg with some minor changes in the circuits.
Not sure what to make of it.
Edit:
Some of the textures look more smeared with the normal textures.