I am by no means a suspension expert, but I will say that my RK 1.5" has a softer ride, mostly stock JKU, running Rancho RS 9000XL shocks. I wouldn't drive my JKU like a sports car with these springs and no added weight as there is noticeably more body roll, to be expected in even a minor lifted vehicle. With that little said it is my understanding that the AEV springs are stiffer and provide a more sports car like feel, never driven an aev equipped jku so I can't compare. The only regret I have with my RK is that I didn't go to the 2.5" kit.