Both are good. Pad choice makes a huge difference. There's a trade off between those that generate more heat than others in terms of fade, depending on fluid used and on feel depending on whether braided hoses are used or not.
Best brakes I ever experienced were Brembo Gold line Radial callipers fitted to a Gen 2 Aprilia RSVR. You could lock that front wheel up from three figure speeds if you wanted to. In fact the Gold line Radials used from 2001 on Aprilias, Ducatis and other bikes were all superb but pad choice was critical. Sintered EBH HH pads were de facto if Brembo OEM pads weren't stretched to and crappy rubber hoses best changed for braided ones.
Saying that, the callipers on my 2016 GSA are superb. No complaints at all with those. I think either are fine and many differences will be down to variables in pads used, fluid used, temperatures generated and how heavy handed or not people are with brakes. Most brakes can be run into fade. The track shows up very quickly which factory brakes might benefit from better hoses, pads and choice of fluid or indeed calipers. For road use other than badge bragging rights, I can't really see there being significant difference in use between Hayes or Brembo. As long as I don't ride on the things and they work well when needed.
Best brakes I ever experienced were Brembo Gold line Radial callipers fitted to a Gen 2 Aprilia RSVR. You could lock that front wheel up from three figure speeds if you wanted to. In fact the Gold line Radials used from 2001 on Aprilias, Ducatis and other bikes were all superb but pad choice was critical. Sintered EBH HH pads were de facto if Brembo OEM pads weren't stretched to and crappy rubber hoses best changed for braided ones.
Saying that, the callipers on my 2016 GSA are superb. No complaints at all with those. I think either are fine and many differences will be down to variables in pads used, fluid used, temperatures generated and how heavy handed or not people are with brakes. Most brakes can be run into fade. The track shows up very quickly which factory brakes might benefit from better hoses, pads and choice of fluid or indeed calipers. For road use other than badge bragging rights, I can't really see there being significant difference in use between Hayes or Brembo. As long as I don't ride on the things and they work well when needed.