Kind of a crappy explanation in the article on this point.It has to do with the connectivity.
No matter how the article attempts to differentiate, both printers have built in wireless LANs that happens to be of the WiFi variety. All WiFi are wireless LANS but not all wireless LANs are WiFI - there are different types of wireless LANs, ie Bluetooth vs WiFi.Whereas the PRO-100 included a wireless LAN interface, the PRO-100S is fully Wi-Fi enabled and supports direct printing via Wi-Fi from smart devices is also available via Canon’s Easy-PhotoPrint+ (EPP+) app.
Ya got proof for that, chief? Chances are such if the past is prologue in MS world, but now you made me look this up. Seems there ARE issues with Windows 11 for some printers.If your printer will work under Win 10, then it will work on Win 11