The Corsair 4000D Airflow is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant advantage over the competition is its storage capacity, offering 100% more 3.5" drive bays. This hardware configuration provides a clear edge for users who prioritize internal expansion and data storage density within their system build, making it the superior choice for those requiring additional mechanical drive support in their chassis.

Choose the Corsair 4000D Airflow if your primary requirement is maximizing internal 3.5" drive storage for your workstation or media server needs. Conversely, select the NZXT H5 Flow (2024) if you are looking to optimize your budget, as it holds a 10% advantage in MSRP. Both cases offer comparable performance in the remaining categories, so your final decision should rest on whether you value extra storage capacity or a lower initial purchase cost.