It would be quite an interesting contest of a Batt'leth vs. a Minbari fighting pike. I would say the X-Factor is the Minbari discipline and utter dedication to their warrior ways. The Klingon's X-Factor is sheer ferocity.
I think a Dahar Master would be able to equal a Minbari warrior in terms of skill and mental discipline.
If this were a Deadliest Warrior Episode I would imagine the two Klingon experts being Worf and Martok with the Minbari experts being Neroon and Kalain. I can see Worf arguing vehemently that the Klingon warrior culture is equal to that of the Minbari.