The MSI MEG X870E ACE MAX wins in 6 out of 14 comparable specs, with 6 ties. Its biggest advantage is LAN (300% better).
MAG B860 TOMAHAWK WIFI wins in 2 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose MEG X870E ACE MAX if you want the best overall performance — especially lan.
Choose MAG B860 TOMAHAWK WIFI if pcie x1 slots matters more to you.
