Originally Posted by Freebase Dali

It has less to do with the host program and more to do with the synths, sounds, and plugins you use and how you use them.
From my understanding, a lot of folks make Dubstep with both FL, and Reason. Reason will probably have everything you need. Here's a decent enough resource for host-specific video tutorials:

Boy in a Band » Reason 4 Tutorials

Just scroll down that list. There's a Dubstep tutorial that might help you get started in Reason.