The Noctua's are probably better but not so much that I would not recommend the SP120, I have a set of those and one had a whine to it for a while but that has sense gone away. I have a Noctua CPU cooler though and I don't hear that at all when it's the only thing running. Just look at the CFM and DB ratings and decide if the difference is worth the difference in price (CFM better when higher generally, DB better lower, higher CFM generally results in higher DB's).