Just do what I'm doing - ignore it. Its not worth it. If he's serious, he should go talk to Stephen Ambrose - he's able to explain what the differences are, and not only that he can show the differences (scientifically). They do handle pressure differently. The APEX modules are probably a little more consistent on sound - as you expect with a vent and a filter (and thats all it is). In fact I liked the U10 sonically better with APEX than any other filter - but the U6 definitely with the MAM or B1.
No - I don't have alien ears, and I wouldn't stoop so low as to ridicule anyone either
Anyone who wants to know the differences - I'd suggest talk to Vitaliy, then talk to Stephen, and see which one
makes more sense to you.
I've had the opportunity to try both and I'm convinced that the ADEL is making the difference. My tinnitus doesn't flare as much - and that is a real relief if I'm wearing the U6 for a few hours. YMMV. I make no claims - simply tell how it is for me.
At the end of the day though, if you listen too loud, then no matter what filter system you use, you're in for the same result (hearing loss).
And I'd like to once again commend Vitaliy and 64Audio for the U6. I appreciate them more and more every time I use them. Simply wonderful IEMs.