1. Architecture: Eclipse Che is a cloud IDE with an integrated workspace server and plug-in system, while Jenkins is a continuous integration server that automates the build and deployment process. Che allows users to develop code in a collaborative environment, whereas Jenkins focuses on automating the software delivery process.

2. Environment Provisioning: Eclipse Che provides developers with ready-to-use development environments that can be accessed from any device, while Jenkins requires users to set up and configure their own build environments on local or remote servers. Che simplifies the setup process for developers, while Jenkins allows for more customization.

3. Integration: Eclipse Che integrates seamlessly with other tools and services such as Git, Jira, and Docker, providing a comprehensive development environment, whereas Jenkins primarily focuses on integration with build tools like Maven and Ant for automating the build process. Che offers a more holistic approach to development, while Jenkins is more specialized in continuous integration.

4. Scalability: Eclipse Che is designed to scale easily to accommodate a large number of users and workspaces, making it suitable for enterprise use, while Jenkins may require additional configuration and resources to scale effectively. Che offers a more scalable solution for teams of varying sizes, while Jenkins may require more maintenance to handle increased workload.

5. Workspace Isolation: Eclipse Che provides isolated workspaces for each developer, allowing them to work independently without affecting others, while Jenkins is primarily focused on automating the build process across multiple developers' code changes. Che's workspace isolation provides a secure and efficient development environment, while Jenkins's focus is on coordinating the build process.

6. Containerization: Eclipse Che leverages container technology to provide consistent and reproducible development environments, ensuring that developers have the same setup every time, while Jenkins can also utilize containers for build execution but primarily focuses on orchestrating build pipelines. Che's emphasis on containerization ensures uniformity across development environments, while Jenkins utilizes containers as part of the build process.

In Summary, Eclipse Che and Jenkins differ in their architecture, environment provisioning, integration capabilities, scalability, workspace isolation, and containerization approaches.