Not seeing that myself, though the margin is quite low. BM and SV are approximately even, with MM a little over 2k behind. I'm in all 522 gear aside from a TF bracer. I could see MM continuing to catch up as that gets better though.
That said I've been running SV mainspec and MM "offpsec" for a while now, MM for farm content to do something different now and then. It's not bad at all.
I specced into MM and been using it for like 2 weeks now,got tired of BM,does about the same damage as BM and its my favourite spec,so i'm probably gonna use it instead of BM for progress unless we really miss the dps (1% wipes n stuff)
If its that far behind why is Z showing me higher as MM. I have 520 gear. It's not.end.all be all buts its.fairly accurate. Sorry for the punctuation. I'm driving.
There are a lot of things that go into a FD profile. Settings such as when to use Aimed shot (manual cast at certain cast speed thresholds, etc), fight length, buffs/debuffs, shot priority. Make sure your BM/SV profiles are correct and that they use similar conditions. Though the first one only really has the potential to make MM even higher for that specific setting, there are others.