Pros: Decent treble, decent mids, decent bass, detail, nice looking
Cons: Noise issue, nothing is unique at all...
If i rate the W4 is 10/10, Xba-4 is 8/10. The W4s are Ok at every expect but lie down a setback note from the W4s ability. Only one thing which the Xba-4 is better than the W4 that is: the Xba do not have the zz zzz sibilance sound..
The biggest issue on this new Sony flagship iem is having a freak noise when playing music and the smaller one is no-unique sound signature.