Originally Posted by Influxreptile

The problem with that is that I'm pretty much the only "competitive" SMF warrior with enough WOL logs to consider when comparing to TG. After having a discussion with the people who sort out simcraft for SMF we concluded that a lot of stuff hadn't been implemented correctly. Arms is without a doubt better than Fury right now but when you're simply making the choice between going SMF or TG I'd personally think twice.

Errors in the recent simcrafts were:

The fact that Heroic Strike is favored over RB during Inner Rage or whenever you're close enough to make it to your next Inner Rage without capping rage.
Second minor thing was that Gurthalak procs were overestimated. As we know now it doesn't simply just proc off everything in the main and offhand.
The third error was that initially Simcraft did not use Heroic leap on cooldown which is another (minor) SMF advantage due to the 20% overall bonus damage.

A last thing to keep in mind is that there are heroic weapons (although not BIS) available to SMF throughout the entire progression phase while Arms will effectively be using a normal ilevel weapon until the patch (and expansion) is cleared, which imo makes the entire "bis" issue debatable as it won't really contribute to your performance when it matters.

Considering fights like Hagara where proper cleaving on ice tombs can be a considerable boost to your dps I'd also guess SMF to be the most favorable spec on that fight due to cleaves being a lot stronger.