Well this looks like an original post.
I think there are no 'fundamental differences'. The bikes are essentially duplicates. The America has chrome and longer bars, the Speedmaster has dual disks. Sit on both and take the one you like.
I would suspect the Kawasaki is a more powerful machine and may be a better long-hauler or for 2-up. But there's something to be said for not having to try to pick yours out of a lineup, and you wouldn't have that Triumph personality that generates all the conversations that come from owning a Triumph... I mean really, how many times have you heard of someone running through traffic to catch you and say: "Man, that's a gorgeous bike, I used to own a Kawasaki back in the day!" Don't know if there is anyone here that hasn't had someone ask about their Triumph. That's got to be worth something.
