The Seasonic Prime TX-1300 ATX 3.1 wins in 4 out of 9 comparable specs, with 4 ties. Its biggest advantage is PCIe Connectors (150% better).
VERTEX GX-1200 wins in 1 spec (MSRP: 39% better).
Recommendation
Choose Prime TX-1300 ATX 3.1 if you want the best overall performance — especially pcie connectors.
Choose VERTEX GX-1200 if msrp matters more to you.
