The ASRock B850 Steel Legend WiFi is the objective winner of this comparison, securing more victories across the evaluated technical specifications. Its most impactful advantage is the inclusion of PCIe x16 slots, which offer a 100% improvement over the alternative. By outperforming the MSI PRO B860M-A WIFI in seven categories while matching it in five others, the ASRock motherboard establishes itself as the more robust option for users requiring superior expansion capabilities for high-bandwidth components.

Users who prioritize primary expansion capacity should choose the ASRock B850 Steel Legend WiFi to take full advantage of its doubled PCIe x16 slot count. Conversely, the MSI PRO B860M-A WIFI is the better selection for those who specifically require more PCIe x1 slots, as it provides a 100% advantage in that area. Selecting between these two motherboards depends entirely on whether your build configuration relies on high-speed primary slots or additional secondary peripheral connectivity.