The ASRock H670 Steel Legend and the MSI PRO B850M-A WIFI are objectively tied, as each motherboard leads in four distinct specifications with five categories remaining equal. The most impactful advantage for the ASRock H670 Steel Legend is its PCIe x1 slot configuration, which offers a 200% improvement over the alternative. Conversely, the MSI PRO B850M-A WIFI provides a significant edge in memory capacity, delivering a 100% increase in maximum supported RAM compared to its competitor.

Users who prioritize expansion capabilities and require additional PCIe x1 slots for peripheral cards should select the ASRock H670 Steel Legend. This board is best suited for builds that rely on multiple add-in cards. Alternatively, the MSI PRO B850M-A WIFI is the superior choice for workstation tasks or memory-intensive applications that benefit from the doubled maximum memory capacity. Choose the MSI option if your primary requirement is supporting larger amounts of system RAM for your specific computing needs.