There are many reasons to prefer the Dark Rock Pro 4 over the Noctua NH-D15. Firstly, the Dark Rock Pro 4 is quieter, thanks to its innovative Silent Wings 3 technology. Secondly, it offers superior cooling performance, thanks to its six heat pipes and two powerful fans. Thirdly, it is compatible with a wide range of CPUs, including all the latest Intel and AMD models. Lastly, it comes with a five-year warranty, which is twice as long as the warranty offered by Noctua.