My wife is in a mk6 TDI Sportwagen, photo evidence below. I frequently drive both cars in the same day, sometimes hopping from one running car to the other. I had some concern about muscle memory confusion because both are stick shift with completely different engines, but it was no problem.
Driving anything other than the FR-S now feels like driving a bus. On average we get the advertised mileage on both cars, sometimes better, sometimes worse, depending on obvious things. My only complaint about the FR-S is the window seals when wet and below freezing.
My wife thinks the FR-S is more comfortable to ride in, on account of the comfy seats, and that is with stock suspension on both.
I'm not sure what else to say. Goodbye to vagcom, hello to relays?