No, watch the vid carefully. In particular, FF to 5:36 to 7:00, the Samurai never fought with that kind of speed.
Plus, you know the Ninja are fast enough to block shurikens with their swords and shit. If Katsumoto goes toe to toe with the silver face ninja, silver face'll pull his little stubby dagger (6:45) and stab him in the eye. Smoke bombs. All kinds of pointy shit. Oh my....
Face it, dude, the Ninja are just better.
Faster in the scene I quoted. FF to 6:19, watch their exchange, it's far faster than anything we see from the Samurai. They can block shurikens and shit. And at 6:55, Cho pulls the dagger from his chest (That was some McClane shit BTW), hurls it back at silver face, and silver face snatches it out of the air.
Stronger (FF to 5:53, Cho was strong enough to hold dudes short sword at bay, not to mention at 8:34 when Cho held silver face's sword between his palms while silver face had all his strength and weight behind it.
Far superior damage soak, look at the punishment Cho took. Katsumoto woulda been on his knees crying like a *****.
More cunning.
FAR more agility.
The Ninja in TLS fought like idiots, Cho and silver face are light years ahead of them.