I'm not sure it qualifies, but it's at least useful. I've been leveling a ton of alts through Korrak's and noticed that I can do both the alliance and horde versions of the quest to kill Korrak on one character. I picked up the quest on horde, then queued for alliance as merc so I could turn in the quest, then noticed I could pick up the alliance version with a different name. Completed them both. Weapons not unique.