Does the battery charge faster with USBC output from charger or powerbank?
I only have a powerbank with USBC out and it does seem quicker than a USBA output from charger rated 60w.
But it is hard to be sure with only one battery! And it could be teh powerbank performing slightly better (it is a big one with three outputs).

USB-C with PD will change much faster than USB-A can achieve,   so not specifically the source of power but the specification of the delivery.

You can normally tell if it's fast charging by the speed of the leds