How does this make sense to you? Even if most of my damage would come from bugs, I would need to gear accordingly to take most advantage of those bugs. I doubt I would be top dps with random gear on me, no matter how much I abuse bugs.
At the same time remember most other classes gear for bugs also.
This is what I mean by tests of no relevance, there is no gear difference between you and him? At 10k dps difference I doubt it, and then you test on Maloriak, he could easily not have had time to dps the adds in the Green Vial phase, and you prolly got in a full KS and maybe some AR, or he could be using AR at the wrong time, or he could be doing Tricks of the Trade on you, and you not on him.
Generally every fight that has some dps increase in it(Maloriak, Magmaw, etc) is really bad at making any kind of real testing, because if he even skips a few seconds of the burn phase he loses way to much overall dps. The only reliable conclusion u can draw from that screen is that he does things worse than you, but not what exactly those things are.