These fan makers, always copying each other...look at the Tecware Omni P12. Well, the Tecware would be the very cheap version, without the rifle bearing and connections. Also, the have a little angle winglet like surface at the end of each blade that these EK do not seem to have. I have 3 Omnis. They are good in which they can pull a lot of air from a filter without dispersing in it to the sides. Way better at that, at same speeds, than other fans I have/had, including the XPG Vento 120, ID-Cooling XF 12025 SD old (probably the most original of all these) and then the XF 12025 SD new, FL 12025, Aerocool Frost 12, all three with the same shape, same as those new Thermalright and others. But not sure if the Omnis are better than the classic old shape that I also have (how all PC fans were before they started with the weird blade shapes).
Noise: not bad up to less than 1300 RPM, then they get noisy. Luckily they are good enough at pulling air through the front filter that I don't need much more than 1300RPM. They have some strong resonances though, and when they go pass 1500 they start sounding different and resonate strongly.