The MSI MEG Z890 ACE wins in 8 out of 14 comparable specs, with 2 ties. Its biggest advantage is M.2 Slots (200% better).
ROG STRIX Z490-E GAMING wins in 4 specs (PCIe x1 Slots: 100% better).
Recommendation
Choose MEG Z890 ACE if you want the best overall performance — especially m.2 slots.
Choose ROG STRIX Z490-E GAMING if pcie x1 slots matters more to you.
