RAGS games look like text-based adventure game, but without need of using keyboard. All actions are done with mouse-click in friendly interface.
To compare flash/html game, RAGS game have more text. You can see same amount of picture in RAGS game than flash/html game.
The main difference, is in the way you will do action. In flash/html game, you will click directly on picture, or in button. In RAGS game you will right-click in list of item/character, and move through clicking on compast.
Most people prefer interaction directly with picture rather than in list. That is more immersive.
Personaly, I prefer RAGS interface. That is really a matter of personal choice.