Are Corsair RMx and be quiet! Pure Power units really better than cheaper alternatives like Montech?

Specialist communities like r/buildapc treat the Corsair RMx and be quiet! Pure Power 13 M lines as A-tier, citing Japanese capacitors, 10-year warranties, and consistent lab results. Cheaper units like the Montech Century II get praise for value on PSU tier-list discussions, but multiple r/buildapcsales threads flag noisier fan profiles and earlier ATX 3.1 compliance hiccups, so the premium for an RMx is largely buying acoustic and QC consistency.