The be quiet! Dark Base Pro 901 is the objective winner of this comparison, securing victory in five out of eight evaluated specifications. While the Antec Flux Pro offers a significant advantage by providing 100% more included fans, the be quiet! Dark Base Pro 901 distinguishes itself with a superior storage capacity, featuring 150% more 2.5" drive bays than its competitor. This makes the latter the more versatile choice for users requiring extensive internal hardware mounting options.

Users prioritizing out-of-the-box cooling performance should select the Antec Flux Pro for its doubled fan count. Conversely, those building high-capacity storage systems or workstations will find the be quiet! Dark Base Pro 901 more suitable due to its substantial lead in 2.5" bay availability. Choosing between these two cases depends entirely on whether your primary build requirement is immediate airflow configuration or the ability to house a larger number of solid-state drives.