.I had a salesman tell me the only difference between Carrera and S brakes were that the S was red calipers. I knew the difference was 4 piston vs 6 piston. Possibly another reason I'm leaning towards a low optioned S than a high optioned 991, especially when my 997.2 is perfectly set up with tubi exhaust, clear bra and wheel spacers........I'd rather a salesman check to get correct answer than wing it and BS a customer who knows the answer. My salesman was a former Rolls Royce /Bentley guy who switched over to Porsche. Nice accent but lacking in knowledge.........