The Thermalright Peerless Assassin 120 is the objective winner of this comparison, securing two out of three spec victories. While the DeepCool LT720 360mm holds a significant edge in cooling capacity with a TDP rating that is 59% better, the Thermalright Peerless Assassin 120 provides the most impactful advantage by offering an MSRP that is 72% better than its competitor. This makes the latter the more efficient choice based on the provided specifications.

Users prioritizing budget efficiency should select the Thermalright Peerless Assassin 120, as its superior MSRP provides the greatest value according to the specs. Conversely, those who require maximum thermal management capabilities should opt for the DeepCool LT720 360mm. By choosing the former, you capitalize on the primary cost advantage, whereas selecting the latter ensures you benefit from the 59% higher TDP rating for more demanding cooling requirements.