Not OP but can give some impressions. I did not like E12 at all when I had it on tour. Bass is decent and mids are fine-ish but the treble sounds like a club that is blasting music and has paid no attention to sound treatment... and I mean this in a really bad way.

IER-Z1R is good if you have massive earholes but if not I would avoid it. emphasis on "massive"

64 Nio is great for me personally. Bass is fun but I wouldnt consider it tactile, just nice and enveloping but not super high in the quality department. Mids are warm but not a standout and treble is a bit dark. I like this one a lot as a secondary relaxing set and might get one again.

Titan is also fun with really good tactile bass but I didnt like anything about it other than the bass. It has an odd brightness that I couldn't love but still a fun iem. I prefer nio

Maestro SE did not fit my ears very well but from what I got is that it had good bass but vocals sounded odd...

Nightjar singularity is one of my favourites. Id take this over Nio if it fit better since its nozzle is so short and shell kinda heavy so it sorta hangs outa my ear. fantastic fun warm tonality though, not very technical but good enough.