Why you would need bigger caliper?
I can't see any use for it.. bigger surface would just make the brakes less sensible, the locking power would be the same(infinite because is actioned by pump not like tire surface by gravitation).. no better cooling without bigger disc.. it would make more sense how the others say, quality pads/fluid. But why to bother with bigger caliper surface..?
Bigger caliper=bigger discs=more stopping power
Pads, fluid will be changed either way, and the bigger calipers are not expensive so why not?
I think it would increase the stopping power.