Two music websites (youtube is not a general music website, but there is a lot of music, GrooveShark is only music). What do u use most? I use uTube mostly!
Youtube is a lot more popular and has videos for not just music but much much more. If you like random songs coming on that are related to what you like then go to Pandora and make a station
*Reads OP...* "Spotify." --- sigh... I like GrooveShark better for music. A few reasons are: songs usually download faster, you can make a playlist to make listening to multiple songs in a row, easier, with GrooveShark there's also a loop button for convenience.
YouTube is mainly for sharing videos. So it's like comparing apples to oranges...I use YouTube more often for videos, but GrooveShark for music.
