Sorry, I remembered those 2 sites as selling Koni Yellows back when I was shopping around for mine 4 years ago. Both had good prices. Koni yellows and reds are not the same, the red's don't have adjustable stiffness, and I'm pretty sure they don't have different perch setting. I had bought my yellows from Tire Rack, I got them at Tire Rack dealer cost, which was about $120 each. I don't know if Sport's and yellow's are the same.