I just saw that now.
Its new software for over 7,5psi boost. Previous software is good for psi up to 7psi so is same for 535,575 and 600 kits.
You probably have bigger fuel injectors in the 7,5psi kit to to cope with extra fueling requrements.
Obviously they are satisfied with the testing of the higher boost kit in the Bildeler car hence release to public.
You just make higher boost by running a smaller pulley and belt, that's all
in any event, I have DCT so I cant run boost higher than 6psi, unless I fly ESS out to me for 7000US to flash DCT software
anyway now you really need brakes and coilovers