I am not sure where you meant to post this, but a simple DPS test between specs with anecdotal findings doesn't belong in the Soling old instances thread. We also don't user target dummies for anything other than rotation testing/work. Using them to measure DPS has long been proven to be ineffectual.
Okay I made a little test on the little dummy. I did not have any buffs or anything. The first one was BM with Dire beast and Lynx Rush. I popped all my CD at the start for max burst and made 49k dps and then it slowly went down to 35k and after a while to 30-32k dps. I was using Spirit beast for mastery buff. My pve gear I used is mostly HC DS and reforged mostly in mastery.
The second attempt was in Survival. I used Skarr from Molten Front for the same mastery pet buff and popped all my CDs at the start for max burst. I used dire beast and Murder of Crows. Well the max i was able to do was 36k dps and then it was stable all the time at 33-35k.
So overall it seems that BM is best because of his burst and because mastery does the greatest damage. The problem comes when I join the raid. I am slowly getting used to BM, but Survival is still best for AOE and since I am used to the rotation, I can make higher numbers even in surv other than BM. But as I said, I am getting used to it, so it gets better every day