The MSI MAG B550 TOMAHAWK is the objective winner of this comparison, securing more individual specification victories than the ASRock B760M PG Lightning. While the ASRock B760M PG Lightning offers a significant advantage in maximum memory capacity, which is 100% better than its competitor, the MSI MAG B550 TOMAHAWK provides a more robust foundation overall. Its most impactful advantage is the inclusion of additional PCIe x16 slots, representing a 100% increase over the ASRock alternative.

Users prioritizing expansion capabilities and multi-card configurations should select the MSI MAG B550 TOMAHAWK for its superior PCIe slot count. Conversely, the ASRock B760M PG Lightning is the better choice for builders who require the highest possible memory capacity for their system. Choosing between these two motherboards depends entirely on whether your specific build requirements lean toward increased memory support or the flexibility provided by additional expansion slots.