The MSI MAG B460 TOMAHAWK wins in 4 out of 13 comparable specs, with 6 ties. Its biggest advantage is PCIe x16 Slots (100% better).
B660M DS3H DDR4 wins in 3 specs (Max Memory Speed: 64% better).
Recommendation
Choose MAG B460 TOMAHAWK if you want the best overall performance — especially pcie x16 slots.
Choose B660M DS3H DDR4 if max memory speed matters more to you.
