The Phanteks NV5 is the objective winner of this comparison, securing six out of eight total specification categories. Its most significant advantage over the Lian Li O11 Air Mini is its capacity for 2.5" storage drives, which represents a 100% improvement in that specific metric. While the Lian Li O11 Air Mini maintains a lead in 3.5" drive support, the Phanteks NV5 demonstrates superior versatility across the majority of the evaluated hardware specifications.

Users who prioritize high-density 2.5" storage configurations should select the Phanteks NV5 for its expanded drive capacity. Conversely, the Lian Li O11 Air Mini is the better choice for builders who require a higher volume of 3.5" bays, as it offers a 300% advantage in that specific area. Choosing between these two cases depends entirely on whether your build necessitates more 2.5" mounting points or a greater number of 3.5" storage slots.