The NZXT H9 Elite (2024) is the objective winner of this comparison, securing more category victories than its competitor. Its most significant technical advantage is the inclusion of 2.5" drive bays, which offer a 100% increase in capacity compared to the Phanteks G400A. This expansion capability provides a clear edge for users who prioritize internal storage density within their system build.

Users who require maximum storage flexibility should choose the NZXT H9 Elite (2024) for its superior drive bay support. Conversely, the Phanteks G400A is the better option for budget-conscious builders, as it holds a 67% advantage in MSRP. Selecting between these two cases depends entirely on whether your priority is the increased storage capacity of the former or the lower cost of the latter.