[JGC]

Everyone is right about the incease in feel. If you think of it as resolution, the greater the more control.

Larger diameter disc and more pistons, more resolution.

The actual stopping force at the wheel is based on piston area and pressure. Given the same pressure, more piston area will give more clamping force. So long as the pads are as large as the pistons the stopping force is about the same as a larger pad.

A larger pad will not wear as fast. If you don't wear your pads out during a race, they are large enough. You don't brake hard enough, frequently enough on the street to really need huge pads.

Getting the overall system to work together is most important. Front and rear balance is critical along with the right pedal ratio so it doesn't require excessive pedal force. Just changing calipers or rotors at one end is a mistake if the car was braking properly otherwise.

All that said, 6 piston calipers and 15" cross-drilled and slotted rotors look REAL COOL!