Little bit of a comparison...
A PBR caliper...2 piston one from Oz used on various Ford and GMs here.

A Brembo 4 piston one from an SRT 8.

A Brembo 8 piston one from various AMG cars.

I was going to use the first one originally on my car but skipped that and went right to the second one...and now going with the 3rd