pilot-byom, the main benefit I see is the presence of a visual aid to change the radio frequency on the right time. When you're about to enter a controlled airspace, SD alerts you in the main map to be prepared to contact the right service with the related frequency. When you're about to change FIS, no alert and no visualization of the approaching boundary on the main map. Only a (correct, by the way) reference in the virtual radar, which, of course, is far less efficient (just for example, in the virtual radar the visual position of the boundary depends on your current heading).

Thanks.

Andrea.