The Phanteks XT Pro Ultra is the objective winner of this comparison, securing more category wins across the evaluated specifications. Its most impactful advantage is a 26% improvement in MSRP compared to the NZXT H9 Elite (2024). While both cases share several identical specifications, the Phanteks XT Pro Ultra provides superior value based on the provided data, whereas the NZXT H9 Elite (2024) offers a 33% advantage in 2.5" drive bay capacity for users requiring additional storage mounting options.

Choose the Phanteks XT Pro Ultra if your priority is a more cost-effective build, as it leads in MSRP efficiency. Conversely, select the NZXT H9 Elite (2024) if your primary requirement is maximizing internal storage, as it provides a significant lead in 2.5" bay availability. Both options remain competitive across the remaining specifications, so your final decision should depend on whether you value the lower cost of the former or the increased storage capacity of the latter.