The MSI MAG X670E TOMAHAWK WIFI wins in 8 out of 13 comparable specs, with 4 ties. Its biggest advantage is PCIe x16 Slots (200% better).
B660M DS3H DDR4 wins in 1 spec (MSRP: 70% better).
Recommendation
Choose MAG X670E TOMAHAWK WIFI if you want the best overall performance — especially pcie x16 slots.
Choose B660M DS3H DDR4 if msrp matters more to you.
