The Corsair HX1500i is the objective winner of this comparison, securing victories in six out of nine evaluated categories. Its most significant technical advantage is the inclusion of PCIe connectors, which offer a 133% improvement over the alternative. This superior connectivity ensures that the unit is better equipped to handle demanding hardware configurations that require extensive power delivery options, establishing it as the more robust and versatile choice for high-end systems.

Users building workstations or enthusiast-grade PCs requiring multiple high-power components should select the Corsair HX1500i for its expanded connectivity. Conversely, the Corsair RM750e is the better option for budget-conscious builders, as it holds a 71% advantage in MSRP. Those who do not require the extensive PCIe support provided by the larger unit will find the latter more cost-effective for standard builds that prioritize affordability over maximum expansion capabilities.