The be quiet! Dark Base Pro 901 is the objective winner of this comparison, securing victories in seven out of eight measured categories. Its most significant advantage over the competition is the inclusion of fans, which provides a 100% improvement in that specific area. By offering a more comprehensive feature set across the majority of the evaluated specifications, it establishes itself as the superior option for users prioritizing hardware inclusion and overall versatility in their build.

The Lian Li O11 Vision is the better choice for budget-conscious builders, as it holds a 33% advantage in MSRP. Users who already possess their own cooling solutions or prioritize a lower initial cost should select this model. Conversely, the be quiet! Dark Base Pro 901 is the ideal selection for those who prefer a fully equipped chassis that eliminates the need for additional fan purchases, ensuring a complete out-of-the-box experience for their system assembly.