When Dark Age of Camelot launched back in 2001, I felt it was EverQuest, only without the parts that I didn't like. By the same token, Warhammer Online: Age of Reckoning might be World of WarCraft: PVP Done Better.
Comparing WAR to WoW is inevitable — there are too many similarities to be dismissed. Both feature Orcs with cartoonish armor, both use similar fonts, and heck, even the names are similar. According to Games Workshop — the owners of the Warhammer name — Blizzard ripped them off. That might well be true, since my knowledge of Warhammer is limited to taking a look at a friend's miniatures and thinking, "Painting all of those must have been a hell of a lot of work." Even if Blizzard did borrow heavily from Games Workshop, because WoW launched first, Warhammer Online will be inevitably compared to WoW.