I like "Savage Geese" reviews but, as with so many reviews, they can make mountains out of mole hills in order to make points seem more, uh, pointed. In the video when they compared interior noise of the Air to the BMW, they used a sound meter to determine the Air interior was 4 decibels louder than the BMW. At least they were objective about it, but . . .
The minimum difference in volume that the human ear can perceive is around 3db, with volume increases not becoming clearly discernible for some people until around 5db. In other words, a 4db volume increase is right at the threshold of discernibility.
Also, noise levels in a car interior are partially dependent on the source and frequency of the noise. One car can be quieter than another on one type of surface but noisier than that same other car on a different type of surface.
So, basically, a 4db difference in sound level between any two cars on the same surface is meaningless in terms of concluding one car is more "luxurious" than the other or, for that matter, even meaningfully quieter than the other.