The Gigabyte X870E AORUS MASTER wins in 8 out of 14 comparable specs, with 4 ties. Its biggest advantage is PCIe x16 Slots (200% better).
PRO B860M-A WIFI wins in 2 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose X870E AORUS MASTER if you want the best overall performance — especially pcie x16 slots.
Choose PRO B860M-A WIFI if pcie x1 slots matters more to you.
