I'll take a more instrumental approach as not everyone enjoys the same genre of music. These obviously can be categorized into genres but they are subtle enough to just be pleasant background music not something in your face.
Give both of them a 2 second listen, theyre pretty much consistent all the way through. I wouldnt imagine them being really loud on the loading screen.
Also, just a note to the previous posters: dubstep and drum/bass are best when youre at a concert, I cant stand it when im sitting down at home. It's dance music not good music. PLS GO TO CONCERTS TNS, DUBSTEP SHULD NOT BE ON UR IPODS.