ProCharger's 1FT202-SCI part number is a tuner kit and only comes with the P-1SC-1 head unit, intercooler, brackets, and hardware. This is a bare-bones kit for someone doing a custom engine build and who's going to supply their own fuel injectors and tuning.
ProCharger's 1FT212-SCI part number is for a complete supercharger kit that includes the P-1SC-1 head unit, intercooler, brackets, hardware, 50lb/hr fuel injectors, and a PCM tuner pre-loaded with ProCharger tuning specific to the kit. This is the ProCharger kit for the vast majority of customers and what we almost always recommend.