Seeking common ground means being more tasteful, more popular or in a better position than others.
It is even harder to seek differences, and it is even harder for people to accept new things. Especially snack bars.
Only by investigating your user base and understanding their needs can you determine your menu.
In our community, cold noodles and wonton are better to sell. But even wonton is made of seafood powder. Quickly mix powder, soup, egg soup and the like. Adults feel nutritious.
Some shops mix bean jelly very well, even small shops will attract people.