For Spotify: Spotify provides users the unlimited catalog of music for arbitrary online listening. It features a detailed introduction of artists and albums, personal playlist and recommended songs, artists, playlists for your preference. If you feel bored with the regular playlist, you can adapt the moods and genres to create a more pleasant atmosphere. More often Spotify will offer you mainspring and popular songs with certain publicity. Most people check for can Spotify work offline. And yes Spotify without internet gives the privilege to listen music.
For SoundCloud: A highlight in SoundCloud is its mixes style songs and undiscovered charming artists. As SoundCloud allows users to upload and share audios product, sometimes you may encounter a surprisingly good song though with a little fame. This really fits for users that would like to try something new. As it is reported, however, a paid subscription service possibly does not offer so abundant tracks as before. SoundCloud playlist doesn't give personal album, and that's why you get someone's uploaded works when searching for him.