unless you are coasting down a hill, the b8 isnt that much better on gas. you litterally have to be barely touching the throttle or it sucks it down. and mine is stock. my b6 with longtubes and tune could do 18 mpg easy, sometimes being real light on the throttle i could see 20. my b8 is not much better especially being DI and two less cylinders. My mpg meter tells me in the b8 that i have 300 until empty and ill realistically get 180. at least my b6 didnt lie to me, it knew what it was.
interior might look nicer but in terms of feel and material is much cheaper in quality overall. in a daily driven car which my b8 is not anymore (my underpowered, archaic mk4 gti vr6 does 8 mpg’s better per mile than it) the b6’s interior is a much nicer place to be. much better made, much sturdier feeling, the b8 doesnt compare. i own(ed) both, so please stop trying to tell me about my cars lol