I bought a pair of the LG's following your recommendation, I wasn't that impressed to be frank. Tuning on them is fairly neutral if that's your thing and they are a good looking well made pair of earphones but nothing awe inspiring other than the price. Maybe that seller has now switched to selling copies?
ZST are a bright headphone if you compare them to a Kinera for example, and they're certainly in the top 30% of 40 earphones I've listened to in the last few weeks. However, I was simply referencing the fact that Kokakolia said people were saying they were too bright.
You're right about peak at 10kHz and I think that's what @Coil is referring too as well, doesn't bother me too much though, a shade lower and it would have got right on my nerves though.