A dictionary groups data with key-value pairs, focusing only on storing information in a simple structure. A class, on the other hand, is a blueprint for creating objects, bundling both data (attributes) and behaviors (methods) to define them together. For example, a dictionary might hold a pet's name, breed, and age, but it's still just a collection of key-value pairs without any inherent behavior.

The core problem of a dictionary is that it only stores data without providing any behavior.

The class bundles both the data and the speak method, demonstrating how classes provide structure for organizing attributes and behavior together.