The Thermalright Peerless Assassin 120 SE is the objective winner of this comparison, securing more favorable specifications than the Thermalright Peerless Assassin 120. The most impactful advantage offered by the Thermalright Peerless Assassin 120 SE is its superior TDP rating, which provides a 9% improvement over the alternative. This performance edge makes it the more capable option for managing thermal output based on the provided technical specifications.

Users prioritizing maximum thermal efficiency should select the Thermalright Peerless Assassin 120 SE to take advantage of its higher TDP rating. Conversely, those who do not require this specific thermal improvement may consider the Thermalright Peerless Assassin 120, as it remains a viable alternative in the remaining categories where the two coolers are tied. Choosing between them depends entirely on whether that 9% advantage in TDP capacity is necessary for your specific cooling requirements.