Can 2 Midihubs co-exist in one midi hub?

Is it possible to plug two Midihubs into a usb hub and then into the host? Will they be detected as separate devices with separate ports or will they conflict?

(I’m talking about in use - can I plug two of these into a host via a hub and get 8 midi outs (USB in to midi out).

Yes, you can plug multiple Midihubs into the host - all of them will be treated as individual Midihub devices.