vs. 
Here are competing webites, one trying to make a name for itself and one which is dominating the market already. To be honest I am not sure how much they compete, because one is .mp3 based and on cell phones, ROKUs, and many other devices, while the other I did not hear about until tonight and bases their playlists on .mp4 format (video).
I use Pandora ALL THE TIME, but as technology progresses and ROKU (not to mention other products coming from Google and Apple) continue to progress I foresee Uwall taking over because they took Pandora's model and made it visual, using YouTube, not to mention they allow you to set up play lists based on your mood.
vs. 
The real choice is up to you and you may want to continue checking which is better over time. Databases and product grow over time; although so does whether a company finds money for support or charges customers. Time tells all!
