The Phanteks NV5 is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant advantage over the Phanteks G400A is the inclusion of 2.5" drive bays, which offer a 100% improvement in capacity for smaller storage drives. While both cases provide distinct hardware configurations, the Phanteks NV5 demonstrates a superior overall design profile based on the total number of winning specifications identified in this analysis.

Users prioritizing high-density storage for 2.5" drives should select the Phanteks NV5 to take advantage of its doubled capacity. Conversely, those who require extensive support for 3.5" hard drives should choose the Phanteks G400A, as it provides a 100% advantage in that specific storage category. Your final decision should depend entirely on whether your build configuration relies more heavily on the larger 3.5" form factor or the smaller 2.5" drive standard.