Since the EZ superimposes a fueling signal on the CANbus just like the ECM fueling command, it can never override the absolute maximum fueling limit programmed into the VP-44. By tapping the pump wire downstream of the VP-44's "brain", the Comp takes control of the fueling solenoid away from the VP-44 and, therefore, is not subject to the VP-44's absolute maximum fueling limit programmed into the firmware.
The EZ is a fueling and timing box with a built-in boost fooler.
Rusty