The ASRock X870 Steel Legend WiFi is the objective winner of this comparison, securing a lead in seven of the fourteen evaluated categories. Its most significant technical advantage is its maximum memory capacity, which is 100% higher than that of the alternative. While the MSI MEG X570 UNIFY holds its own in specific areas, the ASRock X870 Steel Legend WiFi provides a more robust foundation for modern systems based on the majority of the measured specifications.

Users who prioritize high-capacity memory configurations should choose the ASRock X870 Steel Legend WiFi to take advantage of its superior support. Conversely, the MSI MEG X570 UNIFY is the better option for those who require additional expansion capabilities, as it offers a 100% advantage in available PCIe x1 slots. Selecting between these two motherboards depends entirely on whether your build requires maximum system memory or a higher density of legacy expansion connectivity.