Yes, you are correct. I guess what I was trying to say was that there is no way to make a fair comparison between Napster and Spotify - it's not even an apples to oranges comparison.
Of course it is. It just isn't possible to determine the quality of the companies/developers from that comparison, since you have to account for external factors. But you can still show that those external factors prevent Spotify from becoming better than Napster.
