The ASUS ROG MAXIMUS Z890 HERO wins in 8 out of 13 comparable specs, with 2 ties. Its biggest advantage is M.2 Slots (200% better).
MAG B550 TOMAHAWK wins in 3 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose ROG MAXIMUS Z890 HERO if you want the best overall performance — especially m.2 slots.
Choose MAG B550 TOMAHAWK if pcie x1 slots matters more to you.
