I saw a HP/Torque graph comparing the 2 engines, and the 1833 was slightly higher throughout the rev range. I can't remember where I saw it, but it was over a year ago when the new bike just hit the showrooms.

As for the limiter, I've read that too. I'm amazed that Honda set it so low. I think the K1600 has a limit on the LT model, but the GT has a higher limit or none at all.