I bought Saints this season, just before SLX 4 became available. I've compared the caliper shapes, and the Saints have considerably larger piston diameters, even though both brakes have a larger pair and and smaller pair. I'm sure this lends to more all-out power for the Saints, but how much power that translates to would be difficult to discern by eye. I bought them for my 160/150 29er, so probably would have been more than happy with the SLX 4 (but definitely stoked on my Saints, they never let me down).
Sept. 1, 2020, 8:15 a.m. - Mammal
I bought Saints this season, just before SLX 4 became available. I've compared the caliper shapes, and the Saints have considerably larger piston diameters, even though both brakes have a larger pair and and smaller pair. I'm sure this lends to more all-out power for the Saints, but how much power that translates to would be difficult to discern by eye. I bought them for my 160/150 29er, so probably would have been more than happy with the SLX 4 (but definitely stoked on my Saints, they never let me down).