Pandora: DJ/Radio Cast

[Keyser Soze]

its too narrow. you put in a artist or song and they shovel shit at you. last.fm is built upon people actually listening to music. they observe what people are listening to and gather all their collections into categories, sub-catagories, etc.... its more organic, its more representative of a larger segment of user preferences, its taking everything everyone is listening to in real time and creating and evolving the collection of genres and subgenres.

one is based on a small group of elitist music 'experts' the other is based on what real people are listening to.