Small detail relating to sword oath not a lot of people mention is that PLD auto attacks faster than the warrior as well, not sure how big of a difference this makes. As for the subject overall there were old threads on this with lots of tests and most of them concluded pally and warrior damage is the same (in sword oath/out of defiance) with storms eye pushing PLD slightly ahead.
In actual raid content warrior is usually going to win simply because they can do more damage in tanking stance, Unless the PLD is doing nothing but dps then the warrior is going to do more.
