It's more complicated than that. Of course some ears are better than others. But also, most ears are
different from each other.
Hence they hear the sound
differently, through their own pavillion, their own ear canal, etc..
For that reason, two "good" pair of ears (and by that I mean with similar hearing abilities frequency-wise (20-20K), loudness-wise (down to -X dB), etc.) may still hear the sound differently.
So because of that, one good pair of ears may prefer, say, the L30, while the other good pair of ears prefers, say, the Atom.
That doesn't mean that one of the devices is
better than the other (as in "objectively better"). It just means that ears are
different.
The only thing that tells us consistently and reliably that a given device can be considered better than another are the
measurements. Period. This is ASR after all.
Your post was perfect... until the last part which ruins it. No, there's no proof
at all that you "hear things that others don't". Otherwise we could as well say that all people who like the L30 more "hear things that you don't". And that would get us nowhere.
Here's the truth. You may indeed hear things
differently, e.g. with your ears favoring some frequencies and disfavoring others. Your ears have their own frequency response. And so, you are free and welcome to say that you like any given product more than any other, even if measurements say otherwise. What you are
not welcome to say is that you "hear things that others don't". You'll be welcome to say that the day it will have been proven scientifically, which AFAIK won't be happening anytime soon. So until then, let's just consider all ears here as "equal but different". That way you can say that you hear things
differently and so you have your own preferences, jusr like anybody else, without implying anything else by that. Thank you.