I thought the USB C offers much more current supply and therefore improves the Phantom power, Preamp rail and all the other stuff running off the USB cable (assuming your pc has the USB C card)
the old is USB is 5v 500ma, < per Wiki>
A specific USB-C mode may also be entered, where 5 V at either 1.5 A or 3 A is provided
If you use a wall wart, that will eliminate that benefit of C power bump.