For example, a (dairy) farmer's cheese is going to be completely different from a blue cheese, which is completely different from a sharp cheddar. Each of those is "missing" something compared to the others. Quality vegan cheeses often try to mimic characteristics of different kinds of dairy cheeses, and often come very close. For some kinds of cheese, people actually find them indistinguishable from the classic dairy versions; for example, if you tried 5 kinds of Blue Cheese, you'd likely find differences between them, and might not even be able to identify which one was vegan.