The be quiet! Dark Base Pro 901 is the objective winner, securing victories in seven out of eight comparable categories. Its most significant technical advantage is the inclusion of 2.5" drive bays, which offer a 150% improvement over the alternative. While the Corsair 3000D Airflow falls behind in total spec count, it maintains a distinct edge in affordability, boasting an MSRP that is 72% better than the primary competitor.

Choose the be quiet! Dark Base Pro 901 if your build requires extensive storage capacity and a high-end feature set. Conversely, the Corsair 3000D Airflow is the superior selection for budget-conscious users who prioritize cost-efficiency over the expanded drive support and additional hardware specifications found in the more expensive option.