Things look pretty simple for me, WAR needs +10 lvl gear over PLD to tank the same boss more efficiently, on the other hand WAR does heaps more dps(i do 700 crits) and can manage multi-aggro situations better. Both PLD and WAR can manage to do the same things some do it better than the other and thats why we got 2 tank jobs and not 1. None is superior or inferior.