1. Download Arma 3 Game Files and Start a Server
2. Download Arma 3 Dedicated Files and Start a Server
Search both Server in the normal Serverbrowser. No Filter should be active. The Server using the Game Files should be displayed Green, and the Server using the Dedicated Server Files should be displayed Yellow.
Then try to search the Servers, with the Filter enabled that no Mods are used. Only the Server using the Game Files still displayed.