The MSI MAG Z890 TOMAHAWK WIFI wins in 8 out of 14 comparable specs, with 4 ties. Its biggest advantage is PCIe x16 Slots (200% better).
B860M AORUS ELITE WIFI wins in 2 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose MAG Z890 TOMAHAWK WIFI if you want the best overall performance — especially pcie x16 slots.
Choose B860M AORUS ELITE WIFI if pcie x1 slots matters more to you.
