Any high(er) end fan will perform pretty similar to any other high(er) end fan. If you normalize the loudness of the 140mm fans, the be quiet! Silent Wing 3, BlackNoise NB-eLoop B14, EK Vardar, Corsair ML, and Noctua A14 will all push pretty much the same amount of air.
ThermalBench has tested quite a few fans, and a good chunk of them perform within a margin of each other.
Keep in mind that the scales for each graph are different. Also that hearing a 1 dB difference would require active listening to discern for the average human.