The NZXT H5 Flow (2024) is the objective winner of this comparison, securing victory in five out of eight measured specifications. Its most impactful advantage is the inclusion of fans, which represents a 100% improvement over the Thermaltake S100 TG. This superior cooling configuration provides a significant head start for users looking to build a system with better out-of-the-box airflow capabilities without needing to purchase additional hardware immediately.

Users prioritizing thermal performance and out-of-the-box cooling should select the NZXT H5 Flow (2024) for its fan advantage. Conversely, the Thermaltake S100 TG is the better choice for builders who require extensive storage capacity, as it offers a 100% advantage in 3.5" drive bays. Choosing between these two cases depends entirely on whether your specific build configuration demands more integrated cooling hardware or a greater number of internal storage mounting points.