No, That Is Not A Clean Install

Lots of writers saying that a Win10 Reset is or “essentially is” a clean install.
No it is not.
The only true clean install is to wipe and reformat the partition. For a clean install, I prefer a wiped and unformatted disk (the whole disk, not just a blank partition). This way Win10 can do it’s thing. Or, you can wipe the drive and create a new partition before install. In the screenshot below, notice the now even bigger System Reserved Partition. This is from a BIOS based install, an EFI install would have an additional partition.
It’s nice to see all those big sites posting “how to clean install windows 10” articles. Remember you saw it here first 😉