I'm sure Adel does what it intends to do.
But original Zeus XIV or R or XR is a no compromise pleasure, even at high volumes it never shouts or is peaky or sibilant.
I experienced what you experienced with the Rosie from my former se846 (horrible iems BTW, I'm so glad to have moved on) idk how the se846 sells for over 300...
It's not sibilance. It's the pneumatic pressure build up which causes your ears to ring after a while. ADEL IEMs and semi-open IEMs don't have this.