The Corsair 2500X is the objective winner of this comparison, securing a lead in four out of eight evaluated specifications. Its most significant advantage is a 29% increase in maximum power supply unit length compared to the alternative. This superior internal clearance provides greater flexibility for housing larger, high-capacity power supplies, making it the more versatile option for builds requiring substantial electrical headroom and complex cable management configurations within the chassis.

Choose the Corsair 2500X if your primary requirement is accommodating a larger power supply unit for high-performance hardware. Conversely, the Thermaltake S100 TG is the better selection for users prioritizing out-of-the-box cooling solutions, as it offers a 100% advantage in the number of included fans. Opt for the Thermaltake S100 TG if you prefer a pre-configured thermal setup that minimizes the need for additional fan purchases during your initial system assembly.