I look at it this way....
Pretend headfi were a site dedicated to dining and fine eateries.
Even though you can get a better meal than mcdonalds, if a franchise came out with a new dish which challenged the Big Mac at its own game, it would have an audience and be perfecty worthy of praise. But it would be too far of a stretch to compare a Big Mac to a Morton's filet. The same can be said about cheaper meals. You can probably score a tastier meal for 10 bucks than mcdonalds meal but if the markets are different, it would be tough to justify a comparison
My only problem with this comparison is that soul/beats are not in the price range of a little big mac. I'd consider Skullcandy a better comparison to McDonald. Cheap, low quality but targets those looking for something cheap and fatty.
Beats are more like a gourmet McDonald. Basically taking the same thing as the regular McDonalds and just slapping a higher price tag and serving it in a plate rather than a little cardboard box. At this point, you can just go across the street and eat a real gourmet meal for the same price that has much more class and quality. (Not sure if I'm making sense... I'm really tired from studying for finals). Though, some people just don't appreciate said class and quality and would rather pay the same for a cheap burger.