For the main differences between the two sets of rotors. The R1 Premium drilled and slotted rotors that I recommend are G3500 rated carbon metallic material, double drilled and slotted to provide two rows of drilled holes between each set of slots (with the slotting being an exclusive "diamond slot" design that helps to improve pad bite and longevity at the same time), the drilled holes are beveled to eliminate the risk of cracking from sharp edges on the holes, come standard with a military grade black electrocoat for corrosion resistance (although I can have them custom coated to fully cover the rotor so that when installed and fully bedded in, the E-coating also covers the areas inside the holes, slots, internal veins, etc for better corrosion protection for those that wish to have it). They also offer a limited lifetime warranty for defect protection. So if they crack at anytime, you get them replaced for free.
The Stop Tech rotors mentioned are equal to the R1 Eline series rotors. They are G3000 rated cast iron, offer a single row of drilled holes between each set of slots, they do have a coating, but it is a basic zync coating that will not hold up as well over time as the black electrocoating. They offer a 1 year limited warranty against defect.
The stop tech rotors (same as centric) are good options, they just won't put up with the same abuse and will not last as long as the R1 premium rotors, especially on heavier trucks like ours. I have tested the package I offer, extensively on everything from 1/2, 3/4 and 1 ton gas and diesel pickups, hauling ridiculously heavy loads of farm goods, much more than any Raptor will ever see, through the mountains of NC and VA and never had a failure or premature excessive wear. I also have one Raptor customer that, after installing the package I recommend, ran his Raptor through two Baja 1000's and countless other Raptor runs and family weekends hauling his other toys around, over a three year period and after three years on the truck he replaced the pads and kept going on the same rotors.
You can check out my listings below and let me know if you have any further questions. I run different sales all the time, some are better than others, but I always offer an FRF 10% discount off of the list pricing.
https://raptor-svt.freedommotorsports.us/index.php?main_page=index&cPath=1126_1128_1370
