The Gigabyte B660M DS3H DDR4 is the objective winner of this comparison, securing more total specification victories than its competitor. Its most significant advantage is the inclusion of additional memory slots, which provides a 100% improvement in capacity potential compared to the MSI PRO B660M-A WIFI DDR4. This hardware configuration offers greater flexibility for users who prioritize system memory expansion over other connectivity options when building their desktop platform.

Users who require maximum RAM capacity should choose the Gigabyte B660M DS3H DDR4 to take advantage of its superior memory slot count. Conversely, the MSI PRO B660M-A WIFI DDR4 is the better selection for those who specifically need more PCIe x1 slots for expansion cards, as it offers a 100% advantage in that category. Selecting between these two motherboards depends entirely on whether your build prioritizes memory density or additional peripheral connectivity.