all disc-brakes are very good – they’ve all got loads of stopping oomph (technical term).
if you keep your discs free from GT85 you’ll find very little difference in oomph between brakeset-A and brakeset-B. even if A is lots cheaper than B.
even more so when you’re off-road (where your brakes have lots more oomph than your tyres have grip)
paying more money doesn’t get you more oomph, just lower weight and more adjusting knobs and dials.
Biggest load of cobblers iv’e ever heard