The Corsair HX1500i is the objective winner of this comparison, securing more total spec victories than the Corsair SF850. The most significant advantage offered by the Corsair HX1500i is its capacity for PCIe connectors, which provides a 133% improvement over the alternative. This substantial lead in connectivity makes it the superior choice for users requiring extensive hardware support and high-end expansion capabilities within their system builds.

Users should select the Corsair HX1500i if they prioritize maximum connectivity for complex configurations. Conversely, the Corsair SF850 is the better option for budget-conscious builders, as it holds a 43% advantage in MSRP. By choosing the latter, consumers benefit from a more accessible price point while still receiving a unit that remains competitive across the majority of measured technical specifications.