It does not compare at all! Not sure how you see it similar. The same Gadgeteer sockets, the same way they worked before, but now you can add more sockets to your mainboard through the hub. The same drivers, the same modules, work on direct sockets and indirect sockets.
You can add our power extender https://www.ghielectronics.com/catalog/product/441 between the mainboard and the hub. Then the hub and all modules connected to the hub get their power from the power extender.
I’m sure that this has it’s place but couldn’t you just use a FEZ Cerberus Mainboard to do the same thing with a wider array of sockets? They are selling for the same price.
That requires twice as many cables. If the hub had a switch where you could disconnect pins 1 & 2 from the mainboard then couldn’t you use a red module to power just the hub?