I had Brembo's on my 13 Roush and on my 2014 I have the Roush brake package, both 4 piston. The 2014 stops better for sure, no doubt. My 14 does have slotted rotors which I doubt changes much. Neither brake package stopped very well going 140+.....The 4 piston brakes up front are sufficient for sure, I have little brakes in the rear. I can only imagine that the 6 piston ones are far better! Anyways for normal street driving both packages were good, I'd say brembos were more dusty and didn't stop as good as Roush ones.
Phase 3 upgrade including CAI, Fuel pump voltage regulator, (648rwhp
torque, Kooks LT headers with off road H pipe, Vossen CV3's, ID1000's, Steeda Heat Exchanger, BMR LCA's,relocation brackets, adjustable Panhard bar, Rear sway bar, Steeda Aluminum driveshaft, X-brace, Differential cover, torque box brace/frame rails, Shelby trans cooler, Mcleod RST clutch/lightweight steel flywheel w/SS clutch line, RP fluids, whiteline transmission bushing,MGW race spec short shifter,Ford racing twin 65mm throttle body, Pro Dyno tuned