Are these really distinct versions?
Yes. These distinct version tags are used for questions that are specific to a particular version. Not all users have upgraded from older versions.
Source Windows 10 version history
What is Windows 10 S?
Windows 10 S is a specific configuration of Windows 10 Pro that offers a familiar, productive Windows experience that’s streamlined for security and performance. By exclusively using apps in the Microsoft Store and ensuring that you browse safely with Microsoft Edge, Windows 10 S keeps you running fast and secure day in and day out.
For more information, please refer to this page.
Source Windows 10 S FAQ
