I’d say the s12 has a much wider soundstage with better separation (like different instruments seem to be playing at a different level if that makes sense). Also generally brighter and clearer then the arias.

Edit: Forgot to mention the s12 has a much better build quality and a really nice and thick silver looking cable, much better than the arias cable.

I’d say yes for me. Pianos and plucking of guitars sounds really good. I’d say vocals are also good. But don’t take my word for it, as you can see the s12 is the most expensive iem I have so of course it would the best I have. You should look up reviews about the s12 from more experienced people.

Hmm maybe that’s why I like it more than the quarks

How are the zero compared to the chu, I’ve seen that they’re quite close in terms of bang for buck.

Wow that’s quite a big jump

Fortunately my chu didn’t break but also I didn’t use it that much. While the chus were good for the price I just kept going back to the aria. I was also considering the dioko but got the s12 instead cause I prefer a brighter sounding iem.

I have to say it’s the Moondrop quarks. It’s the one I used the least, I don’t know why but I find it quite boring to listen to. The quarks and the edx are really neutral but the quarks are neutral but not in a good way. Sorry not really sure how to describe why.

From left to right:

1. KZ EDX
2. Tin Hifi T2 Plus
3. Blon BL01
4. Moondrop Aria & Moondrop Quarks
5. Moondrop Chu
6. Shuoer S12 Pro

This collection is my progress over around 2 1/2 years. I have just received the s12 pro today as of posting this and so far I can say that they are the best one yet, beating the arias by quite abit which was my longest daily driver of the bunch.

This is just a little show and tell from me. Can't really write a review cause I still think of myself as a noob and I cant properly describe their differences besides knowing which one I like more.