Angular services act as a middle layer between business logic and UI, while React offers architectural freedom in separating logic and UI.
Angular services use dependency injection for sharing state and behavior, whereas React allows separating logic through various approaches like Headless Components, Custom Hooks, Context API, and Declarative Composition.
An example in React demonstrates how the Parent component provides store data to the Child component, showcasing the benefits of separating logic and UI for scalability.
While Angular utilizes services with dependency injection, React provides flexibility in separating logic using different patterns, ultimately allowing developers to build architecture suited to their application's needs.