Again: The “..there are no differences between Op-Amps”- fable !! (OPA2134-NE5532-Muses8920)

so, 😉
again: i´ve changed the NE5532 on the ES9018K2m today to an “OPA2134” and i hear absolutely great differences..
The OPA2134 is very “airy”,”lively” (in comparison to the NE5532) see this post:->http://essabre-90xx-rpi.sfb2.com/2018/04/op-amps-ne5532-vs-opa2134-vs-muses-8920-02-essabre-link-dietpi-6-5/
and has (brings back) a certain “glance” in the high-middles/highs..and this is all too because its very less “distorted” than a NE5532 par example..
okay, it misses a little bit the “push” from a NE5532->all said and written in the above mentioned post and some other..
(update: for me also too “thin”; but for this we have our lovely “Muses8920” 😉 )
but the main fact is that there are absolutely great differences; okay i have here a Cambridge Audio Azur 540A amplifier and some phenomenal Mission-Cyrus-speaker; so more “monitor/neutral/british”-sound..
but i dont get it, why some people say (like in my “praised” diyaudio.com-forum too) they hear almost no differences and “..there is to be cleared if its to hear at all”
???
are they (some) completely stupid there or what ? 😉
and such crap i´ve read also as i started to read/buy/change the Op-Amps on our lovely essabre-boards too and this “comments” almost hindered me to start it at all..
so, to come back to start:
upshot: there are great differences by the different OP-Amps and u can hear it loud and clear !! 😉