The ASUS ROG STRIX X870-A GAMING WIFI wins in 7 out of 14 comparable specs, with 3 ties. Its biggest advantage is Max Memory (100% better).
B550 AORUS PRO AC wins in 4 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose ROG STRIX X870-A GAMING WIFI if you want the best overall performance — especially max memory.
Choose B550 AORUS PRO AC if pcie x1 slots matters more to you.
