The Thermaltake Toughpower GF3 1200W wins in 3 out of 9 comparable specs, with 4 ties. Its biggest advantage is PCIe Connectors (67% better).
RM750x (2024) wins in 2 specs (MSRP: 35% better).
Recommendation
Choose Toughpower GF3 1200W if you want the best overall performance — especially pcie connectors.
Choose RM750x (2024) if msrp matters more to you.