Here is a web site full of information about your question.
It is The Scout Rifle Community. ScoutRifle.org
I had the same questions you have when I was considering a Scout Rifle. Now have a custom on a Remington 700 Ti with Burris Scout scope. In my opinion it is a very specialized rifle. Best for moving targets or close woods shots. Nothing better for Whitetail deer or hogs under these conditions.
Just putting a forward mounted scope on a rifle does not make it a true Scout Rifle. It must be setup the right way for you to gain the benefits of its intended purpose. If you try to use it other than the reasons it was designed then you are going to be disappointed. But I believe this is true of a lot of weapons. The only way you are going to know is after your experence with one setup the correct way. Now that I have used a Scout Rifle its a keeper for life.
Good Luck.