It's important to note that bit rate is only part of the story. Spotify uses the Ogg Vorbis file format which is a lossy compression algorithm (just like MP3). 256 kb/s .ogg vs 320 kb/s .mp3 both offer about the same sound quality, it's not likely one could differentiate between them in a blind test.
It's important to note that bit rate is only part of the story. Spotify uses the Ogg Vorbis file format which is a lossy compression algorithm (just like MP3). 256 kb/s .ogg vs 320 kb/s .mp3 both offer about the same sound quality, it's not likely one could differentiate between them in a blind test.