The MSI MEG Z890 ACE is the objective winner of this comparison, securing a lead in ten of the fourteen evaluated specifications. Its most significant advantage over the competition is the inclusion of M.2 slots, which provides a 200% increase in storage connectivity options. While the Gigabyte B850I AORUS PRO maintains a notable 72% advantage in MSRP, it falls behind in the majority of technical categories measured against the MSI MEG Z890 ACE.

Users prioritizing extensive storage expansion and high-end connectivity should select the MSI MEG Z890 ACE for their build. Conversely, the Gigabyte B850I AORUS PRO is the appropriate choice for budget-conscious builders who prefer a lower initial investment over the superior slot capacity found on the alternative board. Your final decision should depend on whether your primary requirement is maximizing internal storage potential or minimizing the total cost of your motherboard purchase.