There is not much difference in performance, unless you get the $3000 sports set. In my opinion it all comes down to brake pads. The other thing are prices, you can get some quality rotors off eBay which are as good as OEM. Drilled ones look really cool, and they are one of the reasons why I'm getting a set of new rims Also from what I've noticed drilled/slotted rotors seem to wear pads slightly quicker than regular ones. That is why I put ceramic pads on my ride, they last longer and there is way less dust.