Personally, I would never buy a used bike with more than 10k on the clock. I'd rather spend a little more and get a nearly new bike. But, if these two bikes were my only options I would probably go with the Kawi. Despite mileage being somewhat equal, the Kwack is 10 years newer and is cheaper. Of course to me, this decision is like trying to decide which pile of crap smells better. But hey, it's your money.