The be quiet! Pure Power 13 M 850W wins in 4 out of 9 comparable specs, with 2 ties. Its biggest advantage is 12VHPWR Connector (100% better).
Focus GX-750 wins in 3 specs (SATA Connectors: 67% better).
Recommendation
Choose Pure Power 13 M 850W if you want the best overall performance — especially 12vhpwr connector.
Choose Focus GX-750 if sata connectors matters more to you.
