The Phanteks NV5 is the objective winner of this comparison, securing six out of eight total specification categories. Its most significant advantage over the competition is the inclusion of fans, which represents a 100% improvement in that specific area. While the NZXT H510 Flow offers a notable benefit regarding storage capacity, the Phanteks NV5 provides a more comprehensive set of features across the majority of the evaluated technical specifications.

Users who prioritize out-of-the-box cooling hardware should select the Phanteks NV5 for its superior fan configuration. Conversely, the NZXT H510 Flow remains the better choice for builders who require extensive internal storage, as it provides 200% more 3.5" drive bays than its counterpart. Choosing between these two cases depends entirely on whether your primary build requirement is integrated cooling support or a higher capacity for traditional hard disk drives.