Can anyone tell me why we have two way different soundtracks, for the same game?

I just found out that there was 2 soundtracks for iClassic. Which soundtrack would you guys want for iClassic? The current one or the Skyrider version? I'm really liking the Skyrider one atm. I don't know how many new songs are on Skyrider but I made a video incomparison for 2 of the songs. I'm hoping they'll switch the iDevice soundtrack to the new songs