Hydraulic pressure will depend solely on the size of the master cylinder and the lever length of the brake pedal. Brake clamping power will be dependent on these as well as caliper puck size. A bigger master cylinder piston will give you a more solid pedal feel with less travel but your hydraulic pressure will be less as will your clamping force. A smaller culinder will be the opposite. Softer pedal and more travel but higer pressure and clamping force. On the caliper side a smaller caliper puck size will give you less clamping force than a larger puck for the same size brake pad.
Blaine
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