Greetings! I've done extensive testing with both the arsenal and pyro specs, and have personally found my pyro build to pull a considerable amount more damage than my arsenal build. I've read Aerro's amazing guide and posts here, and I must say, wow! Those are some crazy awesome numbers. Well done, sir. Yet, try as I might, I can't seem to hit anywhere near that range. I used my own rotation and the one recommended by Aerro, which actually were identical. I'm not quite as geared (552 power, 865.1 tech bonus dmg, 32.77% crit, and 73.87% surge), but I'm well on the way. So, from all my tests, my results on average were this: arsenal yields about 1100-1250 and pyro 1300-1500. Thus, I have decided that I quite love using pyro in raiding and all other things.
Out of curiosity, what sort of numbers are the other raiding pyro fans out there seeing?