The "so called" studio quality microphones are getting their hats handed to them in reviews. There have been side by side audio recordings by many of the unboxers, and MKBHD, with no detectable audio or phonically detectable difference. I suspect what might have happened is they moved to a different supplier who stated that they had O-Scope measurements proving the new mics were better. Since our ability to detect audio is between 20-20khz, if equipment measures the response between 18-35khz, technically they have more range, but margarine is not butter. Sorry, had to add a wacky there. Or in other words, who cares? When we talk to each other that range collapses down to 200-8khz, so any microphone difference would only be a benefit in clarity, not range. When I listen to the audio comparisons, I don't hear any difference, but I'm 59 and spent my military career around jets, turbo props, and jumping from perfectly good airplanes, so what do I know, ehhhh?