does anyone know what the red pbr rear brakes are like from the fg? from my understanding these were stock on fpv's with the four pot front brembo. while im sure they are much better than the brakes on the xt, im wondering how they compare to the uprated xr8 brakes? (328mm rotors on xr8 as opposed to 303mm on xt).

also is there a difference between the front and rear calipers on the fg? wondering if i could use the xr8 front calipers on the rear?