SMF is better at 90 lvl atleast, don't see why TG fury would be better at 70. TG fury #1 damage source is pretty much melee, and of course your target uptime is a lot smaller in PvP. SMF fury offers higher Ececutes, Shockwaves(or Dragon Roar if you decide to use it) etc.
Also what Kipale said. I highly doubt you'd be able to compete on top as arms, even if you were multi rank one player. That's just how bad warrior damage is at 70 and with the upcoming nerfs in 5.1 it's gonna get even worse. With Gag order you atleast could still lock casters and stand a chance against them regardless of your poor damage. Can't imagine warrior killing any good healer even in 2v1 sitution, and that would result in 45minute long ties.
P.S. How are Ferals nowadays? Been planning to ask GM to restore my old 70 Druid. (I have no interest in playing Balance or Resto)