The ASUS ROG CROSSHAIR X870E HERO is the objective winner of this comparison, securing victory in eight of the thirteen evaluated specifications. Its most significant advantage over the ASRock B550 Steel Legend is its maximum memory capacity, which is 100% higher. While the ASRock B550 Steel Legend holds its own advantage by offering 100% more PCIe x1 slots, the ASUS ROG CROSSHAIR X870E HERO dominates the overall feature set across the majority of the measured categories.

Users who prioritize high-capacity memory configurations for intensive tasks should choose the ASUS ROG CROSSHAIR X870E HERO to take advantage of its superior memory support. Conversely, the ASRock B550 Steel Legend is the better option for builders who specifically require additional PCIe x1 slots for expansion cards. Selecting between these two motherboards depends entirely on whether your build demands maximum memory headroom or increased connectivity for peripheral expansion cards.