yeah it sounds basically the same so i agree with the above posts... try chopping some things up and adding one shot synths and stuff like that (complextro style). if you browse youtube, there is some awesome help on structuring dubstep (not only dub but structuring in general) sounds are cool but as your first one it's always good to experiment. just go way out of your comfort zone and trying to do things "properly" and just start messing around with everything - literally!