The be quiet! Dark Base Pro 901 is the objective winner of this comparison, securing victories in seven out of eight measured specifications. Its most significant advantage over the competition is its storage capacity, offering 200% more 3.5" drive bays. This superior hardware configuration makes it the more versatile option for users requiring extensive internal expansion capabilities compared to the alternative.

The NZXT H5 Flow (2024) is the recommended choice for budget-conscious builders, as it holds a 65% advantage in MSRP. Conversely, the be quiet! Dark Base Pro 901 is the ideal selection for enthusiasts who prioritize maximum storage support and a more robust feature set. Choose the former to minimize initial costs, or select the latter if your build requires the high-capacity drive support provided by its superior bay count.