Create React App abstracts away the configuration details, allowing developers to focus on writing code. It comes with sensible defaults and a built-in development server, making it easy to get started without manual setup.

Umi offers a more configurable environment with a focus on convention over configuration. It allows developers to customize the build process and extend functionality through plugins, providing flexibility for complex applications.

Create React App does not include a built-in routing solution. Developers typically need to integrate React Router or another routing library manually, which adds an extra step in the setup process.

Umi has a powerful built-in routing system that supports dynamic routing and nested routes out of the box. This feature simplifies navigation management in larger applications, making it easier to handle complex routing scenarios.

Create React App has a rich ecosystem of community libraries and tools, but it does not support plugins directly. Developers often need to eject from CRA to customize the configuration, which can complicate upgrades and maintenance.

Umi provides a plugin system that allows developers to extend its functionality easily. This enables the integration of various features such as internationalization, state management, and performance optimizations without ejecting.

Create React App is beginner-friendly, making it an excellent choice for developers new to React. Its simplicity and lack of configuration make it easy to learn and start building applications quickly.

Umi has a steeper learning curve due to its additional features and configurations. While it offers powerful capabilities for larger applications, developers may need to invest more time to understand its conventions and plugin system.

Create React App has a large and active community, which means extensive documentation, tutorials, and community support are readily available. This can be beneficial for troubleshooting and learning.

Umi also has a growing community, particularly in the Chinese developer ecosystem. While it may not have as extensive resources as CRA, it is gaining traction and support, especially for enterprise-level applications.