The ASRock H670 Steel Legend is the objective winner of this comparison, securing victories in ten out of thirteen evaluated specifications. Its most significant advantage over the competition is the inclusion of M.2 slots, which provides a 300% improvement in storage expansion capability. This substantial lead in connectivity and hardware support makes it the superior choice for users prioritizing high-performance builds that require multiple high-speed storage drives and extensive component integration.

The MSI PRO H610M-E DDR4 is the appropriate selection for budget-conscious builders, as it holds a 56% advantage in MSRP. While it lacks the extensive expansion options found in the ASRock H670 Steel Legend, it remains a viable option for users who require a basic, cost-effective foundation for their system. Choose the former for maximum storage flexibility or the latter if minimizing initial hardware expenditure is your primary objective.