IB compares to rampart and not block because IB/Rampart are controllable and predictable. Blocks and parry are random, and cannot be depended on to counter specific moments. The block advantage on paladin is supposed to have no direct equal on warrior. The idea is pld blocks more because, haha--its what we do. We are sword and shield. Warrior gets more dps. That's the trade, blocking for enmity.