Superior speed? Lol where in that movie do they show that they are moving like they are hyped up on cocaine or something? I don't understand where this blazing speed you speak of is coming from. And yes, the Yakuza guy had a katana which is a far vastly superior weapon than a knife. Regardless if you wand to admit that or not.
The Indians die horribly. They would of been better off fighting the Myans in Apocalypto or something.