The Corsair RM1200x SHIFT wins in 5 out of 9 comparable specs, with 2 ties. Its biggest advantage is PCIe Connectors (80% better).
Leadex VII XG 1000W wins in 2 specs (MSRP: 38% better).
Recommendation
Choose RM1200x SHIFT if you want the best overall performance — especially pcie connectors.
Choose Leadex VII XG 1000W if msrp matters more to you.
