I've driven Pirellis, Goodyear, Yokohama, BFG, etc., etc. on 400HP pickups, SHO's, Corvettes and Contours. In short, I've actually had driving time on a number of tires...
Out of every street tire I've ever driven on, the Bridestone Pole Position S-03's that I currently have on the 'Tour are hands-down the best. Handling, traction, durability, road noise level; all top-notch.
I haven't driven the KDW-2's, so I couldn't put up an argument against them. I just know that the S03's are top-notch hi-perf street tires.