We were talking N malkorok without adds. For myself, I also do quite close to my sims back then on N Juggernaut and N Siegecrafter.
Those fights I have only one priority which is max dps and for N juggernaut I was Zerker stance all e way. Back on first week of SOO, I think I got top 5 ranks for both back when my sims was ~250k.. Before RB was buffed. I was overseas, missed the 25 main raid so did a 10m instead.
N malkorok has that stupid soaking mechanic which I find that I sometimes get out of hit range. I also caught the debuff which required me to get out of raid (back then I didn't know I could leap behind boss and still dps so I was afk whilst dropping debuff). In short, I don't do my optimal dps on malkorok that I admit.
But my point is not whether I am > than him or he is > me. My point is that his comparison of his actual vs his sim and likewise doing the same comparison of my actual vs my sim is wrong. This is because sim dps depends on the module maker. And as some already pointed out, unholy dps sim is lower and more easily surpassed due to the way disease is computed.
I did a random sample of an unholy DK around his sim dps level. That DK did 305k on normal 10m malkorok vs sim of 270k. It appears to me that there's quite a number of unholy DKs beating their sim.
On the other hand, I picked a few top warriors I know and compared against their dps on N malkorok. I can say that it appears harder for fury warriors to hit our sim dps. Again, this I think is the way our module is created. I would assume that wowprogress sims make use of "patchwork" type sim. Which honestly, how often do we get fights where we have 100% uptime on boss and low movement? That's my point