I think its not right to compare Dhoom with Dhoom-2 because they are 2 different films and the music should be also so they just cant copy down everything from Dhoom. The songs give us that extra rock and rap hip hop touch. You should not comment about these songs with out watching the choreography. I feel that the music is done with keeping choreography in mind. This time the Dhoom team may have given a little extra importance to dances than music.