Are your ears sore from taking so many in and out? I cannot even do that to compare two or three without hurting my ears.
Thanks for taking one for the team... lol.
Seems like people can just choose according to size, fit, style, color. Whatever appeals to you. Or, just get them all
Actually though I personally find differences among them.
My ZST probably needs a Slater mod because it is a bit harsh to my ears. I have a black TRN cable on my carbon ZST. I really want to like it.
Love the ZSR and ED16 - both fit and sound...and looks. Green ZSR, translucent black ED16. I have changed the cables on both.
I had problems with the fit of the ES4 even though its bigger brother the ZS10 fits me just fine (I don't mind that the ZS10 protrudes because somehow it balances well in MY ear). I did not listen to the ES4 long enough to form an opintion on the sound, I just knew I liked the ED16 more. The ES4 belongs to my husband and I have no plan to buy my own. If I ever do it will be the cyan color.
I only tried the ZSA when it was out of phase so no comment on the sound...pretty little thing but it was an awkward fit for me. No one else has seemed to have a problem. Because of my fit issue, I did not bother to try it after the phase problem was corrected. If any of these KZs truly sound horrible be sure to check if it is out of phase... either because the cable is in wrong or it is truly wired out of phase as my husband's one was.
Everyone seems to love the fit of the ZS3 but some corner of it pressed on the wrong part of MY ear. Sounded good though. Maybe different tips would have helped it sit better. Because of my fit issue I traded it to my husband for his Rock Zircon.
I do not have a ZS5 (either generation) but I love my green ZS6.
So pick one... or two... or all... or none...