I believe the PvP melee DPS weapons are better than the heroics by a long shot, since the actual weapon DPS is the exact same as the epic PvE weapons - which is a much, much better stat than say another 100 crit.

Other than that, it seems like the epic PvP gear is basically in line with heroic PvE gear stat wise. But you do get 2 and 4 set bonus with the set PvP gear which probably edges it over if you have 2/4 pieces.