The NZXT H9 Elite (2024) is the objective winner of this comparison, securing victories in seven out of eight evaluated specifications. Its most significant advantage over the competition is its maximum cooler height, which is 200% greater than that of the alternative. While the Lian Li A4-H2O offers a 43% better MSRP, the NZXT H9 Elite (2024) provides superior physical clearance for cooling hardware, making it the more versatile choice for high-performance builds requiring larger thermal solutions.

Users prioritizing budget efficiency should select the Lian Li A4-H2O, as it maintains a 43% advantage in MSRP. Conversely, enthusiasts who require extensive space for cooling components should choose the NZXT H9 Elite (2024). By offering a 200% improvement in maximum cooler height, the latter is better suited for users who need to accommodate larger air coolers or complex cooling configurations that exceed the physical limitations of the more compact Lian Li A4-H2O.