Belt's look in appearance to be exactly the same. The are the same width and length. same bite angle. I don't see anything that would show as an improvement or a downgrade in either. I've been in contact with kawi and seeing if there is in deed any difference in maybe material making the teryx a tougher belt.
The Teryx belt is only $3 more in most dealers. Every one be warned, I got a hold of Kawasaki tech department yesterday, and if there is an issue and your machine is under warranty, Kawasaki is firm in not covering any warranty and they do not recommend that you use the teryx belt. I still might try it if it is tougher and see how it works.
i have one on my prairie. it is 1mm taller is the only difference. no problems and i have about 500 miles on it. more material the better i say. i did have to shim the clutch out. it was way tight when i put it on.