I have KZ ZSN Pro X, CCA PLA 13, Zigaat Nuo & KZ ZS10 Original but this KZ ZS10 Pro X with upgraded drivers is.. Best overall!
Sound quality
Mids - Good vocals, Female vocals are better!
Highs: Sweet & Controlled Extension
Bass: Impact more than enough, subbass is excellent!
Soundstage : Good Depth & Height, bigger than KZ ZSN pro X
Separation: Brilliant Sonic performance, Best of all!
Quality : Better that original ZS10 PRO
Note: I burned in more than 70 hours
I am using wide bore tips for even better soundstage!
Thanks to The Audio store & KZ !