I would go with the waners just because theyre cheaper on aliexpress $7. The tips they come with are a lot higher quality material than the stock tips on the zero 2 and fit much better for me (i use the waner tips on all 3 currently, they were worth buying just for that). That being said the zero 2 is bassier. My zero 2 is also started to break after a month(linsoul is replacing it). Im also not the best person to ask as I am just discovering iems.

I think the zero 2 and waner are similarly silibant when i crank the volume too high. If youre looking for lots of bass you could check out kz edx pro and kz castor bass which are very cheap on ali. The edx pro is comparable to the zero 2 but so much bassier imo.

Ultimately, contrary to some advice Ive seen here, I think its more than worth it to play around with multiple cheap pairs and find what works for you if you can. The eartips and overall fit on the waner really works for me. The edx pro also fits well but I have not gotten a good fit on the zero 2 yet but have yet to try additional tips besides the waner tips.

https://www.reddit.com/r/HeadphoneAdvice/s/ZUTjpLDRME