The Corsair RM850x is the objective winner of this comparison, securing more total spec victories across the evaluated categories. Its most significant advantage is the inclusion of SATA connectors, which provides a 67% increase in capacity compared to the alternative. This makes the unit a superior choice for users who prioritize extensive peripheral connectivity and internal storage expansion within their system builds, as it offers a clear lead in hardware support for multiple drives and accessories.

The Fractal Design Ion+ 2 Platinum 860W is the preferred option for users who prioritize power efficiency, as it offers a 25% advantage in that category. Those building systems where energy consumption is the primary concern should select this unit for its superior efficiency rating. Conversely, builders who require a higher volume of SATA connections for complex storage arrays or multiple peripheral devices should choose the Corsair RM850x to ensure all components are properly supported.