All three of these are baked desserts with a peach filling, but what differs between them is the topping. A cobbler is topped with spoonfuls of thick dough, like biscuits. A crisp is topped with a flour-based mixture with oats, nuts, or coconut to create a crispy texture. A crumble uses a simple streusel topping made of flour, butter, and sugar and is similar to what you'd find on a coffee cake.