The Phanteks Eclipse P500A is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant advantage over the Phanteks NV5 is its storage capacity, offering 100% more 3.5" drive bays. While the Phanteks NV5 falls behind in total category wins, it maintains a distinct edge in cooling hardware, providing 33% more included fans than the Phanteks Eclipse P500A to assist with immediate thermal management.

Users prioritizing high-capacity data storage or complex workstation builds should choose the Phanteks Eclipse P500A for its superior drive support. Conversely, those who prefer a streamlined setup with pre-installed cooling hardware will find the Phanteks NV5 more suitable for their needs. Selecting between these two cases depends entirely on whether your build requires extensive internal storage expansion or a higher quantity of out-of-the-box fans for your system configuration.