The Thermaltake The Tower 300 is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant advantage is a 35% increase in maximum cooler height compared to the competition. While the Lian Li O11 Air Mini offers a substantial 300% advantage in 3.5-inch drive bay capacity, the overall spec-based lead held by the Thermaltake The Tower 300 makes it the more versatile choice for general hardware compatibility.

Users prioritizing high-profile air cooling should select the Thermaltake The Tower 300 to take advantage of its superior clearance. Conversely, the Lian Li O11 Air Mini is the better option for builders who require extensive storage configurations, as its capacity for 3.5-inch drives far exceeds that of the alternative. Choosing between these two cases depends entirely on whether your specific build requires maximum space for cooling hardware or a high density of mechanical storage drives.