A curved blade isn't a disadvantage, the Samuari crafted the shrapest,quickest, and deadly blade of their time, now seeing as Sephiroth's blade was definetly the deadliest their for a while it arouses the questioning of ur comment. The samuari were also very skilled in the use of that blade no doubt, but 2 people with the same skill in a Katana and a (pencil is too easy) wooden spear, I think the person with the katana would win. Plus, samuari have teh uber scare tactic, There freaking insane armor.