Originally Posted by SomeGuyDude
Have you a/b'd? They're actually dang hard to differentiate even at the same bitrate. I dunno what Rdio does with their encoding but it comes out surprisingly clear.
Have indeed, though not with enough scientific rigor. My point was just that the numbers are hard to go by when different codecs are at play. When you go to listen to lower bitrates where it's noticeable that you're listening to lower bitrates, Vorbis shows its edge. At these higher bitrates, the differences are bound to matter less and less. But if someone is going to start nitpicking between 192kbps and 160kbps, they'd better nitpick on the different codecs as well.
I have no idea what Rdio uses to encode either, but that raises a good point about MP3 - there have been a lot of encoders over the years, and even 192kbps MP3 isn't necessarily a great metric if one was encoded shoddily.