Originally Posted by LSs1Power
Both Brembo and ST are very similar in performance and endurance. I like the ST more for their Quick Release option which allows you to change pads without removing the caliper assembly.
If you look at the processes for changing pads step by step with each caliper design, the quickest is an open top caliper with no bridge. The added step to removing the bridge on the Stoptech caliper is equal to the added step of removing the 2 bolts that secure the Brembo monobloc caliper.
The idea of quicker pad changes was not a factor in designing that caliper because the goal was to provide monobloc technology with added weight savings and incredible stiffness.
It's not like removing an OEM style caliper and then fumbling around trying to get pads out, spread open the pistons, place pads back in and then realign everything. It's still an opposed piston caliper and very simply and quick for pad changes. I'd estimate less than 10 min per side, once the car is off the ground and the wheels are off.