I don't think there's much difference, it's all intended for one purpose. Contemporary worship is closer to what we all listen to on the radio and it allows you to get more people involved: guitar player, bassist, drummer, electric guitar player, singers, etc. With traditional, all you've got is a singer and a pianist/organist.

Of all the instruments talked about in the Bible, the organ and piano are probably the oddest ones Biblically. It talks about cymbals, horns, stringed instruments, etc but not an air-powered pipe instrument.

I think the music in Heaven will be loud and exciting....