The main difference I saw between you and the other monk was that you never really used chi wave. I believe using chi wave on cooldown is a dps increase overall. Logs showed it added 1.6k dps to the other monks overall dps. In regards to the crits I noticed two things, first off the other monk has a crit enchant on secondary weapon, which might make a slight difference. The biggest difference however was the fact that you probably didn't have crit buff in raid. Comparing the logs it looked like your party wasn't 9/9 buffed.
