Some are, some are not.Having owned multiples of both, they truly were not.
The "larger" cars (A4 and up) have proper aluminium suspension components and are clearly "more" than a Golf.
The rear axle from a FWD A3 could just aswell be from a Skoda. Or a toy car. They are many things, but certainly not "premium". People don't care about that and - as the larger cars usually have better parts - the public believes the "premium" story.