The NZXT H7 Flow is the objective winner of this comparison, securing more category wins across the evaluated specifications. Its most significant advantage over the competition is its storage capacity, offering 100% more 2.5" bays for drive mounting. This increased internal space provides a clear edge for users who prioritize high-density storage configurations within their build, allowing for a greater number of solid-state drives to be installed directly into the chassis compared to the alternative.

Users who require extensive storage expansion should choose the NZXT H7 Flow for its superior bay count. Conversely, those who prioritize out-of-the-box cooling performance should select the Phanteks G400A. Because the Phanteks G400A offers 100% more included fans than its counterpart, it is the better option for builders looking to minimize additional hardware purchases for their airflow setup. Your final decision should depend on whether your priority is drive capacity or immediate thermal hardware inclusion.