The MSI MEG Z890 ACE is the objective winner of this comparison, securing victory across eight of the thirteen evaluated specifications. Its most significant technical advantage is its maximum memory speed, which outperforms the MSI MAG B460 TOMAHAWK by 214 percent. While the latter board maintains a lead in PCIe x1 slot availability with a 100 percent advantage, the former dominates the overall feature set and provides substantially higher memory performance capabilities for modern system builds.

Users prioritizing high-speed memory performance should select the MSI MEG Z890 ACE to take advantage of its superior memory support. Conversely, the MSI MAG B460 TOMAHAWK remains the better choice for builders who specifically require a higher quantity of PCIe x1 slots for peripheral expansion. Choosing between these two motherboards depends entirely on whether your build configuration demands faster memory throughput or a greater number of available expansion slots for specialized hardware components.