The ASRock B850 Steel Legend WiFi is the objective winner of this comparison, securing victory in seven of the fourteen evaluated categories. Its most significant advantage over the competition is its maximum memory capacity, which is 100% better than that of the alternative. By offering superior support for system memory, this motherboard provides a clear technical edge for users prioritizing high-capacity configurations over the specific expansion layout offered by the other board.

Choose the ASRock B850 Steel Legend WiFi if your primary requirement is maximizing total system memory for demanding workloads. Conversely, select the Gigabyte B550 AORUS PRO AC if your build necessitates additional expansion, as it provides a 100% advantage in the number of available PCIe x1 slots. Your final decision should depend on whether your specific hardware needs prioritize the increased memory ceiling of the ASRock or the greater peripheral connectivity offered by the Gigabyte.