Extra features
What else can each store do and make you want to use it?
Both Discover and Gnome Software support the fwupd back-end for updating firmware of your devices. Fwupd is a software daemon that supports EFI system utilities, disk controllers, wireless accessories and more. See the full list at the Linux Vendors Firmware Service (LVFS) website. It’s a great extra feature to have in a software store.