I can answer this question because I had both of them...My QC15s were awesome...when I didn't have high quality hardware pumping my music. Now I push my music through the Droid X2 and Poweramp Software....the range that I get with my Beats are incredible!! I was going to upgrade to the Pros..but I didn't want to give up my Studios! I listen to what you listen to and I promise you..these headphones are awesome!!
Your answer seemed unclear. Beats or Bose?
Oh sorry about that! LOL Beats Studio..Hands Down!