The Seasonic Prime TX-1300 ATX 3.1 wins in 4 out of 9 comparable specs, with 4 ties. Its biggest advantage is SATA Connectors (50% better).
C1500 Platinum wins in 1 spec (Wattage: 15% better).
Recommendation
Choose Prime TX-1300 ATX 3.1 if you want the best overall performance — especially sata connectors.
Choose C1500 Platinum if wattage matters more to you.
