User stories focus on the user's needs and goals, while requirements focus on the product's functionality. In Agile development, user stories are a way of capturing the customer's needs and goals, and describing the desired functionality from the user's perspective. User stories are typically written in plain language and focus on the "what" and "why" of the product, rather than the "how".
Requirements, on the other hand, focus on the product's functionality and describe what the product needs to do in order to meet the customer's needs. Requirements are typically written in technical terms and describe the specific functions and features that the product must have.
While there is some overlap between user stories and requirements, the key difference is that user stories focus on the customer's needs and goals, while requirements focus on the product's functionality. In Agile development, user stories and requirements are typically used together, with user stories serving as the starting point for the requirements process, and requirements providing the detail and clarity needed to build the product.