The Gigabyte X670E AORUS MASTER wins in 6 out of 14 comparable specs, with 4 ties. Its biggest advantage is USB Type-C (100% better).
B850 GAMING X wins in 4 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose X670E AORUS MASTER if you want the best overall performance — especially usb type-c.
Choose B850 GAMING X if pcie x1 slots matters more to you.
