The ASRock X870 Steel Legend WiFi is the objective winner of this comparison, securing more individual specification victories than its competitor. Its most significant advantage is a 33% higher maximum memory capacity, which provides a notable edge for users prioritizing large-scale data handling or memory-intensive workloads. While the ASUS ROG STRIX X670E-E GAMING WIFI remains competitive across several categories, the ASRock X870 Steel Legend WiFi ultimately offers superior support for system memory configurations.

Choose the ASRock X870 Steel Legend WiFi if your primary requirement is maximizing total system memory for demanding applications. Conversely, select the ASUS ROG STRIX X670E-E GAMING WIFI if your build necessitates a higher quantity of expansion cards, as it provides a 50% advantage in available PCIe x16 slots. Both motherboards offer comparable performance in the remaining categories, so your final decision should depend entirely on whether you prioritize memory capacity or expansion slot availability.