Racing take rotors, which I now discovered to be trash. Low profile tires being the stock 235/40/19, but low profile tires are horrible for launching because there's no sidewall flex, and iirc those tires had a 500 wear rating, which means they were hard and slick, for comparison the PS4S oem tires are wider and about 70% stickier.
In sport mode on the street and those 19" traction control nerfs the power a significant amount, so you get a faster 0-60 with slip start, but it's a very fine line between slipping a little and turning the tires over completely and hitting the slip start traction cut, because when that kicks in the car completely falls on its face. That's why the car was faster at a lower SoC getting launched on the street in slip start, it was easier to keep traction control at bay; it's best to have a little spinning on launch, dead hooking is slower, and too much spin is slower.