comparo, without even driving it (cant, as I havent got the turbo BTR in yet), I can tell you there is no comparison. stock smaller solid rotor with OEM pad and repco fluid, versus, larger vented aftermarket performance rotor with performance pads & high temp race fluid. the goo is all the same stuff, hell, selleys all clear would even work they machine them down so the surface is flat, and the new pad can mate properly with the rotor ... otherwise it creates un-even wear. I didnt give a f*ck, as these were already matched up, so had worn together previously, so no new edges/surface wear