Nothing special beyond any gear/software beyond eye of the beholder.
I use Reason only for everything I do productionwise, but would be lying if I said other programs(including FL)couldn't do everything Reason does plus more.
The truthful answer to the age old production question of "which is better" whether Mac or PC, Hardware or Software, FL or Reason...will always be, whichever you feel the most comfortable with. Nothing else to the answer.
is there anything special about reason?
people tends to flee from their favorite software fl precisely to settle for reason, saying it's heavier in terms of depth n punch, am also a reason freak i use reason 4 in rewire mode sometimes with sonar 8 my favorite soft.