The Corsair 2500X is the objective winner of this comparison, securing a lead across four of the eight evaluated specifications. Its most significant technical advantage is a 29% greater maximum power supply unit length compared to the alternative. While the Thermaltake S100 TG holds its own in several categories, the superior internal clearance provided by the Corsair 2500X makes it the more versatile option for accommodating larger power delivery hardware within the chassis.

Users prioritizing high-capacity power supplies should choose the Corsair 2500X for its expanded internal space. Conversely, the Thermaltake S100 TG is the better selection for builders who value out-of-the-box cooling, as it offers a 100% advantage in the number of included fans. Selecting between these two cases depends entirely on whether your build requires the extra room for a larger power supply or the immediate benefit of pre-installed cooling hardware.