The Seasonic Prime TX-1300 ATX 3.1 wins in 7 out of 9 comparable specs, with 1 tie. Its biggest advantage is PCIe Connectors (150% better).
Focus GX-850 wins in 1 spec (MSRP: 68% better).
Recommendation
Choose Prime TX-1300 ATX 3.1 if you want the best overall performance — especially pcie connectors.
Choose Focus GX-850 if msrp matters more to you.
