First of all, they have different uses. A crockpot is mainly used for simmering food, such as stews, soups, and stews. It usually has a larger capacity to hold more ingredients and usually has a well-sealed lid to keep the food flavorful and nutritious. A stock pot, on the other hand, is mainly used to cook soups, such as chicken soup, rib soup, seafood soup, etc. It usually has a relatively small capacity and is suitable for cooking soups.
Secondly, there are some differences in their designs. Crock pots usually have a thicker bottom to keep the temperature of the ingredients evenly distributed and insulated better. And stock pots usually have a narrower design that allows water to evaporate faster, which can distill the flavor of the soup more quickly.
In a nutshell, crock pots are suitable for simmering food with a larger capacity and better heat retention, while stock pots are suitable for cooking soup with a smaller capacity and refining the soup faster. I hope this answer is helpful to you.