I bought XE800,KZ ATR,ZS3
XE800 is good but very inclined towards treble light on bass but very comfortable for my small ears. ATR is very fun V-shaped. ZS3 is very choosy, I liked it only paired with Xduoo X3, not comfy.
X3 sounds very digital. X2 is very organic.
Not an IEM guy, just using...