The tonality is similar between the 2 earbuds, but EBX 21 kills the ME80 in technicalities by a lot. And of course it is detachable, unlike the ME80. Does that explain a more than 10 times price differential? Probably not, but as usual in this audio hobby, there's huge diminishing returns the higher one goes up the ladder.
SMABAT ST10S (assuming it is the black gold version) will need an amp, hope u have a good source to power it.
As for the earbuds anonymous, if you could cancel your order, I hope it is possible to do that. I found it very anonymous as per its namesake. L shaped bassy set with missing treble and it is quite muddy. Non detachable cable too at $50 USD. One of my worse earbud buys in recent times.
Ya I actually asked them on Aliexpress if they could remake the ME80 again.
But the sellers say, for economies of scale, the various China factories produce many pieces of drivers and shells at one time, and it is cheaper to get it in bulk. They need a bare minimum order of perhaps a few hundreds to thousands. So if only a few die hard earbud fans like us ask for it, but it doesn't even cross a hundred folks, they will most likely not even entertain the idea.
The other issue is that some parts are kind of limited edition. For example, factory A only produces the driver, factory B only makes the cable, factory C only makes the shells. Even if they wanted to restart a new production line for the ME80, sometimes one of these factories has closed permanently or the moulds are lost or something. So perhaps the same shell or driver cannot be obtained anymore. And so if a different shell or driver comes in the new remake, perhaps the sound will be different too.
There's lots of forum reports that the new Tingo TC200 sounds different from the old version. Probably the hype made the old one get sold out, and the factories are rushing to make new stock for more orders, but probably something is different internally in the new batches.