The Gigabyte Z890 AORUS MASTER wins in 9 out of 13 comparable specs, with 3 ties. Its biggest advantage is M.2 Slots (150% better).
B660M DS3H DDR4 wins in 1 spec (MSRP: 82% better).
Recommendation
Choose Z890 AORUS MASTER if you want the best overall performance — especially m.2 slots.
Choose B660M DS3H DDR4 if msrp matters more to you.
