the pad area is smaller on the sumitomo 2pot. its about the size of the piston.
the hilux caliper pretty much is twice the caliper than the 2pot with the least amount of trouble as hilux caliper will bolt right on.
if u wanna run vented discs with the 2pot u have to get spacers made to widen the caliper. thats spacers cut and drilled, extra channel seals, longer bolts, longer pins, and adapt the clips.
both will need to skim the peugeot disc off a few mill in diameter.
the only benefit of the 2pot is it will fit behind 14inch wheels that dont have lots of room on the inner side.