The Corsair AX1600i is the objective winner of this comparison, securing a lead in four out of nine measured specifications. Its most significant advantage over the competition is the inclusion of double the number of SATA connectors, representing a 100% increase in connectivity for storage-heavy builds. While both units offer high-capacity power delivery, the superior connector count provides the Corsair AX1600i with a clear edge in versatility for systems requiring extensive peripheral support.

Users who prioritize maximum storage expansion should choose the Corsair AX1600i for its superior SATA connectivity. Conversely, those building modern systems that require a native 12VHPWR connector should select the Corsair HX1500i, as it offers a 100% advantage in this specific interface category. By evaluating your need for either additional drive support or modern GPU power standards, you can determine which of these two power supply units best aligns with your specific hardware configuration.