How can we differentiate between BRD and FRD?

BRD states about the high-level business necessity alongside the business need and problem it faces while FRD states approximately the functionality required within the application planned for the business issue and the need specifying within the Business requirement document. It notices the Functional as well as Non-functional necessities. Functional necessity is depicted with the assistance of Use case description and Use case diagram whereas Non-functional requirements like capacity, execution, etc. are also covered.