going from a warrior with tank/dps single weapon, to a duel wield dps spec with the same base line attacks is the same class but with different talent trees... AC's are not classes. if they where they would NOT share a tree and would NOT have the same base attacks. There fore they are different specs. Plus they also share the same story line. its like a WoW warrior one spec you have two two-handed weapons another spec you have one handed and a shield. Same base line attacks.... different roles, same class.. different spec...