I am writing an article that explains when to use X instead of Y and vice versa (meaning that one can choose either one from X and Y as one's needs fit), that is the relative advantages/disadvantages of using one over the other. Now which one from the three sentences below is a correct title for my article?
- When should you use X and when should you use Y?
- When should you use X and Y?
- When should you use X or Y?
- When should you use X vs. Y?
1 seems correct to me, but verbose. I have seen both 2 and 3 in many writings, and 4 only sometimes if I have seen it at all. Which of them suits best as my article title?
I will happily accept any other smarter alternative, even if that completely changes the sentence construct.