10 yrs ago, my girlfriend got me a Bjork CD which she got from BMG not knowing I already have a store purchased copy of the exact same CD. There are 2 main differences that I still remember til today which are the reasons why I don't go for cd clubs other than they never have anythign I want.
1) The BMG CD sounds tinny and shrill compared to the store bought copy.
2) The CD cover on the BMG is made of a cheaper thinner paper material than the store bought copy.
Ofcourse, I only care about the first reason. And, for a time, I people thought I was crazy to point out this difference. But, I felt very validated when I found a few articles that stated the same observations. One of which is the article mentioned by Matt.
1) The BMG CD sounds tinny and shrill compared to the store bought copy.
2) The CD cover on the BMG is made of a cheaper thinner paper material than the store bought copy.
Ofcourse, I only care about the first reason. And, for a time, I people thought I was crazy to point out this difference. But, I felt very validated when I found a few articles that stated the same observations. One of which is the article mentioned by Matt.