My bet is that this is a community garden of some sort.
Tomatoes are annuals. They die off every year. So if you liked a tomato from last year, and didn’t keep any of its seeds, and you want that same tomato next summer, you need to remember what you put in the ground.
If you work at a nursery and people are coming in and telling you they had “this” or “that” tomato plant last year, and they can’t remember what it it there is nothing wrong with that sign. If they can’t remember what they planted the year before that is their problem.
They are different for what you’re doing with them. If you’re eating them fresh, you probably want sweet cherry tomatoes or yellow bell tomatoes. If you want them for sandwiches, you might go with a beefsteak tomato because the shape and size make the slices perfect. If you’re canning them for sauce, you’ll want romas because they have less juice in them, meaning you can shave off a good chuck of time to get the sauce to thicken. And as others have said, the flavors are different as well.
They were red and round, the leaves were green or were they blue? No, green for sure. You have to remember me, I was wearing the same hat last year! C’mon!