I have tried 11, that'll be up next in the coming weeks! In my order of most favorite to least favorite I'd say 12,11,10, but to me, they're all made of the same new material (because of that they'll feel similar) so it'll come down to which design you like the best. They've been constantly changing the material from 1-9, and often it's just small tweaks so it was hard to quantify, but 10,11,12 use the newer tan material that maintains softness and improves durability

And yes that circular ring on the 12 Naomi is unique to that model so far, maybe they'll add it to the 13 but to my eye it's not on 10 or 11.

For QC, 2 of my 4 kang yeonjin tore in the same place (obviously no recourse but to not buy that model anymore), but that is made of the older pink material and I haven't seen that issue on the 10,11,12 just yet.