@M52 Nice to see you around the community.
Pandora Premium is currently our highest level of subscription. It includes all the benefits of Plus, but also offers the ability to search and play songs on-demand. With Premium you can create fully customizable playlists, access as much of your music collection offline as your mobile device will allow, and you'll have higher quality audio and longer timeouts than Pandora Plus subscribers.
For more information around our current subscription offerings, check out this thread: Pandora Subscriptions FAQ
I hope this helps!
