If you look at the 993, it was standard with 408hp, then there was a factory kit which was an ECU change(under the dirver seat) took it to 430hp, however this was still on a pair kkk16 turbos, the TurboS 993 had kkk24 turbos, with an additional larger front intercooler as used in the GT2. This gave the TurboS 450hp. however you could order a 993 with the larger turbos and ecu and intercooler so you could have a normal Turbo running 450hp. the options are reflected on a sticker under the bootlid. So they are all production cars, same as a car having either leather or cloth seats for example.