A cookie is a small text file with a unique ID tag stored on a user’s browser directory and contains data like usernames, email addresses, passwords and preferred settings. On the other hand, a cache is a fast data storage layer that stores data subsets, mostly transient, so that future demands for such data are delivered faster than accessing the primary storage location of the data.
The difference between a cookie and a cache is that a cookie’s data is stored both on the server and web browser, while cache data is stored on the browser only. Another difference is that a cache expires manually while a cookie expires automatically.
A cache also consumes more space than a cookie. A cache stores data such as images, CCC, Javascript and Html pages, while a cookie stores browser history and user data.