After little research (all thanks to Rezpkt from DOA) these are the findings:
Overhub is produced by Bluendless Electronics Ltd. and the model number is BS-HUB3.0
Thsi pictures show inside of overhub. And we can see 2x GL3520 chips (that do the MTT stuff
) to handle 2x 4 usb ports
That alibaba link from my first post looks like is using same outside case like overhub, but MTT is not mentioned and PCB photo on alibaba looks different to the one up here. So it’s possible it’s not exactly overhub inside but looks like it from the outside.
on the other hand we can find usb 3.0 hubs that use exact same chip like one in Overhub - the GL3520 .
Example here:
In theory overhub and this cheap usb 3.0 should work the same as they are using the same chips inside.