The ASRock Z890 Taichi wins in 4 out of 14 comparable specs, with 7 ties. Its biggest advantage is M.2 Slots (100% better).
MAG B850 TOMAHAWK WIFI wins in 3 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose Z890 Taichi if you want the best overall performance — especially m.2 slots.
Choose MAG B850 TOMAHAWK WIFI if pcie x1 slots matters more to you.
