Balance and/or fluff reasons and/or mechanical reasons and/or uniqueness factor and/or different writers.
Maybe power fields make it harder to disarm people. You wouldn't know, seeing how there's no real life comparison to draw.
Power Fields: Yes, but we do know how a power field works in universe, because it's been explained many times in fluff, with, for 40k, pretty good consistency. The only thing that a power field would do is increase the odds that the weapon being parried would be destroyed during the disarm attempt.
Fluff: There's no fluff that says that they're not the same style of blade. Only that they're made in different places.
Balance: Questionable. While an additional +10 to parry is good with a power field weapon, there are weapon upgrades that do something similar that it can take anyway. Further one of them is a flexible weapon that can block, an the other is Concussive.
Uniqueness Factor: The rules for the power weapon versions already make them unique. One has Flexible but can also parry, one has Concussive and can perry a Flexible weapon. The other problem is they have illustrations of the power sword versions, which while one lacks the hook (and is generally Assyrian in shape, rather than a classical Khopesh), the other had a clear, large and well developed disarming hook.
Different writers..... dunno, but I have a hunch. See next post.
The Kursian Sickle Sword is based on the sica more than the khopesh, and as it's used in gladatorial fights you can see why it does what it does.
We went over that before on Dakka. Neither the Sica nor the Acinaces, both of which you said it's supposed to be, end in hooks (usually, there may be one off exceptions or modern 'fantasy' swords that use the name and do), and neither one is even close to the shape of a sickle sword. One is a straight thrusting blade, and the other has a slight curve to it.
Further saying 'well "gladiatorial weapon" is why it disarms' sort of directly conflicts with the description you wrote (I'm betting, since you're credited in both books), which states that the disarming hook at the end of the blade is why it disarms.
This is the problem: you named it a real world thing, gave it rules and a description that matched the form and function of that same real world thing, and then are trying to insist that it's not the same as the real world thing. Despite the description and mechanics in Tome of Blood and the pictures of the real world thing next to the other version of it in Tome of Fate.
You could make an argument, based on the illustration, that the 'Polix' sword lacks the disarming hook. However, the 'Castir' clearly not only has the disarming hook, it's very large and well developed (more so than the ones used by King Tut, even), and sharpened. Just like in the description of sickle swords in Tome of Blood.
Edited by BaronIveagh, 10 February 2014 - 11:00 AM.