Vacation: you can be on vacation anywhere, home or away.
Tourist: you are somewhere unfamiliar, you would not be a tourist if you stayed home while on vacation, that would be vacation.
Eg: someone may own property abroad yet only spend 2 weeks there a few times a year. They are away from home yet not tourists because they are familiar with where they are, they are on vacation.
For the benefit of this thread the difference was made relevant to define the people most at risk. People wandering around unaware of their surroundings, or people familiar and either in the wrong place at the wrong time, or making bad decision.
I personally don't think attacks on tourists is that high, it seems experienced people (expats or vacationers) get into more scrapes.
But no, it doesn't matter, this will not change anyone's life.