The be quiet! Dark Base Pro 901 is the objective winner of this comparison, securing victories in seven out of eight evaluated specifications. Its most significant advantage is the Max Cooler Height, which outperforms the alternative by 245 percent. This substantial lead in physical clearance capacity establishes the be quiet! Dark Base Pro 901 as the superior choice for users prioritizing hardware compatibility and internal space over other considerations.

Users who require extensive room for large cooling solutions should select the be quiet! Dark Base Pro 901 to ensure their components fit without restriction. Conversely, the Lian Li A4-H2O is the appropriate choice for budget-conscious builders, as it offers a 52 percent advantage in MSRP. Those prioritizing cost savings over the expansive internal dimensions provided by the larger case will find the Lian Li A4-H2O to be the more economical option.