With 40 dex and 10 humanity I think mine has about 450 AR, compared to 410 AR with the Iaito. It has better range and looks cool. I don't use it too much, but I like it. The Furysword is better stat wise, I guess, but I'm so tired of that weapon.
My least favorite Katana is the Washing Poll because I think the move set should be unique to that weapon and I hate that the huge scabbard clips through the floor.