Several will probably be in the same area, but they will be at different times and with different people. Scenes change a lot, and at times may not seem to have anything to do with the main plot. It's okay to add in extra scenes to prove a small point or to tie in at the end. In a short story, there are generally only a few scenes, and only those needed to directly advance the plot at that time. It goes from beginning to end without digression.
Description is another major one.
The idea is to let the readers see the places where they live, where they go, enter us into their lives completely. In a short story, we only want to see what's happening at that time in their lives. We don't need all the details. In this way, it tends to be much more limited. However, short stories can be far more expressive.