It is not a matter of PC version and WiFi version. The yellow GS911 communicates via Bluetooth, but is a "dumb" unit, ie it has no built in software. The GS911 WiFi (red unit) communicates via WiFi and has all the functionality built in. It can thus accessed from any web browser without the need for extra software. Once accessed though, the PC app can still be used.
Bear in mind though that it utilises cloud services for many of the functions other than straight forward diagnostics. Many of the smartphones have a restriction on external connections, so once a connection is established to the gs911, you sacrifice your connection to the web. Cloud services will therefore not be available.
For the 2016 R1200R though, the red WiFi version will be required.