The MSI MAG X870 TOMAHAWK WIFI wins in 6 out of 14 comparable specs, with 5 ties. Its biggest advantage is PCIe x16 Slots (100% better).
B860M AORUS ELITE WIFI wins in 3 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose MAG X870 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.
