At that item level, it is 212 crit rating, which definitely does change the dps by that much, because crits are what feeds the increased uptimes on all of those buffs. When I change the AMR sim to have the same stats as the simc sim, I get all the same buff uptimes. (Including that fix to comet storm)
It’s actually really hard to set up and exactly apples to apples comparison between the two simulators, unfortunately.