I've had extensive use in both now and HIGHLY recommend Freestyler!
It's geared more toward the mobile dj.
1. Built-in DMX controller for LED RGB pars -- all you do is tell the can to be operated by the controller and it does the rest. With pre-built programs that beat to the music in all different colors or the same. It also can control all of them going static and can easily blackout.
2. Most fixtures are in the library and if not, it's not that hard to build the fixture for them. Their website is now much more friendly for people needing help with fixture building and advise.
3. For moving heads/scanners there are also some pre-built functions, but I've not had the pleasure of testing all of them yet.
4. Dongle is much cheaper.
5. NLFX now carries the dongle! So you can spend money at a ODJT sponsor.
6. Controlling lights is a breeze when you have simple point-n-click buttons at your disposal for changing things on the fly.
7. I'm sure there are more, but I'm getting tired.
And, the new interface for SXpress sucks.