Hello and welcome
Where in the world are you?
I haven't had any experience of CNG I'm afraid.
The Subaru interiors aren't the best. Try Googling the WRX and you should find lots of pictures.
I guess it depends on what you really want from the car? Yes, you have good suspension but I think a lot of us have our Subarus for performance so, for me anyway, not having the 'proper' version wouldn't tick the boxed.
I don't know what you get from a CNG car but can't imagine it's much?