I believe I read here that the calipers are the same on Macan S, GTS, and Turbo and the only differences are the rotors, with the GTS having larger fronts and Turbo with bigger front and rear, and color. Is this true and does it also mean that the pads are the same? I am looking into track pads and there are 2 websites advertising Ferodo DS2500 for Turbo, but not S. I am skeptical that these pads are available, however. topbrakes.com and bestbrakes.com look like they may be the same company and I can't even find the Turbo application in the Ferodo Racing parts catalog. I sent a message to both websites asking for the part number.