The ASRock X870 Steel Legend WiFi is the objective winner of this comparison, securing victories in five categories compared to two for the Gigabyte B850 GAMING X. The most significant technical advantage offered by the ASRock X870 Steel Legend WiFi is its USB Type-C connectivity, which provides a 100% improvement over the alternative. This superior interface capability makes it the more robust choice for users requiring modern peripheral support and high-speed data transfer options.

Users who prioritize advanced connectivity and modern port standards should select the ASRock X870 Steel Legend WiFi for their build. Conversely, the Gigabyte B850 GAMING X is the better option for those who specifically require additional expansion capacity, as it holds a 100% advantage in available PCIe x1 slots. Choosing between these two motherboards depends entirely on whether your workflow demands more versatile USB connections or increased physical space for internal expansion cards.