The Gigabyte X670E AORUS MASTER is the objective winner of this comparison, securing victory in eight out of thirteen evaluated specifications. Its most impactful advantage is the inclusion of M.2 slots, which provides a 100% increase in capacity compared to the alternative. This significant expansion capability establishes the board as the superior option for users requiring extensive high-speed storage configurations for their system builds.

Users should select the Gigabyte X670E AORUS MASTER if they prioritize maximum M.2 storage connectivity for their modern hardware setup. Conversely, the MSI MAG B550 TOMAHAWK remains the preferred choice for those who specifically require more PCIe x1 slots, as it offers a 100% advantage in that category. Choosing between these two motherboards depends entirely on whether your build demands superior storage density or increased expansion card support.