Thanks so much for the instant response,
@voicemaster.
I see that the relatively longer nozzle of the ZSN has this more acute protrusion angle from its shell. This, plus the sloping profile you mention must be the reason why it is so comfortable and such an easy fit for me. Clearly KZ did so many things right with the ZSN.
On the other hand, I anticipate a certain difficulty, fit-wise, with the AS10. For it to have a good fit and for its nozzle to properly align with my ear canal it would have to be pressed further into my ear and that straight and edgy inner portion may exert undue pressure on my concha, leading to pain and discomfort over time.
That's why I can listen to music with the ED16 for only a very short time.
Oh dear...
You are completely right. The AS10 is huge for me and I do feel ear pain after wearing them for a while. I don't know about the rest of the people here, but I actually mainly listen to music on my IEMs when I'm walking outside. The AS10 creates such a strong seal, that whenever my cable is dangling around, I can actually hear it catching the corners of my jacket, shirt, etc., and that sound also hurts my ears. This, of course, is even more present when I'm using them with an 8 core TRN cable, which I now regret buying, less so with the stock one. (call me crazy, but I hate the memory plastic thingie around the ear, and I'm considering removing it with a sharp object, on both cables that is). Also, I like the way they sound and all, but (excuse me, for I am an audio noob) they are too forward? sounding. As in, the sound is so close to my brain that it's actually a bit unpleasant. That could be due to the nozzle having to be pressed further into the ear, as you said.
As I said I'm a complete novice and probably tone deaf, but at this current moment I prefer my ATRs over them but possibly because I've used them for such a long time (2 years or so). Yes, I'd say they sound a bit dull, but you know that feeling of relief after needing a scratch. That's exactly what I feel when I switch from the AS10 to the ATR. And that's very sad, since I prefer the sound of the AS10 by far. Also the ATRs weigh considerably less.
All of this combined with me having non-optimal audio sources (which produce some hiss in the AS10) lead me to the following decision: I'm probably buying a ZSN along with a FiiO BTR3 or a shanling m0, not sure which one yet. But on 12.12 the BTR3 will cost around 60 usd on taobao, and I assume the ZSN will have some price reduction as well. I'm undecided on which ZSN color to buy though, seeing that there is some difference between the models, based on the replies in this thread. People seem to like the purple one and its cable, but they also say the cable is thicker? Which would suggest that my problem with it catching on the edges of my clothing would make it rather unpleasant. If I could, I would get an old school type of cable without any type of edge. Also, call me insane, but buying a separate audio device when you already own a reasonably expensive phone which will always have a better user interface just seems impractical to me. Ergo, my BTR3 choice, which is hopefully a silent source. (Right now I'm using an ancient iphone 4, but I plan on getting an 8 plus, or some random android phone)
Rant over, lots of controversial opinions, I know, but those are my weird preferences, and I am by no means an audio connoisseur.
Can anyone confirm once and for all if there is a difference or not between the different ZSN colors? Also any experience with the BTR3 or shanling m0 as a bluetooth receiver would be quite helpful.