Yes, a huge weapon inflicts a -1 on the user during a normal attack, but a -2 to the opponent on a power attack with no negatives to the user. What I am referring to is this. Both weapons, if you roll an unmodified 6 on your power attack, kill the opponent, regardless of what he rolls. In both cases, you get the same result. In the case of the huge weapon, you're getting a better chance to kill on a power attack if you don't roll a six. In the case of heavy weapon, though, you have the same special rule but you don't have a negative to contend with.
I guess what I'm questioning is if the -2 the opponent gets is more useful than "if you roll a 6 on a power attack, you kill". I mean, does the -1 for huge weapon also apply for when you get attacked? Hence, is it making your opponent have an easier time killing you? It says you only get the -1 when you attack so I guess you don't.
I'm just wondering if the points make sense to take the rule.