The Seasonic VERTEX GX-1200 wins in 3 out of 9 comparable specs, with 4 ties. Its biggest advantage is Warranty (71% better).
SF1000L wins in 2 specs (PCIe Connectors: 50% better).
Recommendation
Choose VERTEX GX-1200 if you want the best overall performance — especially warranty.
Choose SF1000L if pcie connectors matters more to you.
