Owludio
500+ Head-Fier
I agree, that Sony TWS that I have - delivers most of the noise reduction by deep fit isolation, and ANC adds maybe another 15db on top of that. Having used Eymotics before switching to se846, I can say that Shure is close and allows me to enjoy music on low listening levels(about 15db lower than all my friends- I'm quiet listener) and watching trains "silently" zooming by. I have heard good ANC, like Bose and agree, ANC there is impressive as well as probably Airpods pro, but I'm one of those freaks who switched from Spotify because of OGG Vorbis compression artifacts on the upper treble. So re-encoding artifacts from MP3 or from not optimized FLAC - to AAC - make that setup a non-starter for me, even though Samsung supports AAC. Also, ANC tends to cause fatigue.Try comparing a good perform ANC to isolating iems on the airplane and on the train. Those shallow fit iems do not isolate enough, you will hear noise (just that you are probably not aware the noise level because you are used to it, but if you compare it's obvious). Triple flange deep insertion Ety come closest, but none will be comparable to (a good, not crappy) ANC. APP is ANC and Sony ANC iems seems to be more of a gimmic than real NC.
All of that said, I need to drive it down to 2 points:
1. Your comparison with Etymotics isolation got my attention. I now am going to research and try some of that new generation ANC iems.
2. I'm not giving up on Blessing 2 ability to isolate. It's filled up with resin and insertion is fairly deep, so I will investigate if whatever compromises isolation is fixable. It's worth it for me, because out of my large collection of IEMs - Bl2 treble is my favorite. Amazingly, I can hear Google music mp3 treble artifacts with it, but they don't detract much from musicality. And that comparison includes ier-M9. (IMR Rah I'm still experimenting with, it's promising albeit excessively bassy..)