In my experience, copies always worst than original. However, I did a blind test on few friends and many folks actually prefer non-original sound. Copies tend to have less detail in high frequency response and they might seem to have more bass than the original. I also did the MP3 test and more folks like the MP3 over the copied and the original. Since the compress ratio is different, the MP3 actually sounded more lively than the original and copied ( about 2 to 3% faster.) It's matter of preference rather than which is better.