1. Programming Paradigm: Ansible is a configuration management tool that follows the declarative programming paradigm, where the user specifies the desired state of the system, and Ansible takes care of reaching that state. On the other hand, IntelliJ IDEA is an Integrated Development Environment (IDE) primarily used for software development. It follows the imperative programming paradigm, where the user specifies step-by-step instructions on how to achieve a specific task.

2. Use Case: Ansible is mainly used for automating the deployment, configuration, and orchestration of servers and applications. It is particularly helpful in managing large-scale server infrastructures. IntelliJ IDEA, on the other hand, is geared towards software development tasks such as writing, editing, compiling, and debugging code. It provides various features like code completion, refactoring, and version control integration, making it a comprehensive tool for developers.

3. Language Support: Ansible uses YAML (Yet Another Markup Language) for writing playbooks that define the desired state of systems. It also supports Jinja2 templates for dynamic content generation. IntelliJ IDEA supports a wide range of programming languages such as Java, Python, JavaScript, C/C++, and more. It provides syntax highlighting, code analysis, and intelligent code completion for these languages to enhance the development experience.

4. Community and Ecosystem: Ansible has a vibrant open-source community that continuously contributes playbooks, roles, and modules to automate various tasks. It also has integration with various cloud providers and third-party tools. In contrast, IntelliJ IDEA has a vast ecosystem of plugins and extensions developed by JetBrains and the community. These plugins enhance the IDE's functionality by adding support for different frameworks, tools, and languages.

5. User Interface: Ansible is primarily managed through the command-line interface (CLI) or via text editors, as it is designed for automation and orchestration tasks. IntelliJ IDEA, being an IDE, provides a graphical user interface (GUI) that allows developers to interact with the code, project structure, and various tools seamlessly. The IDE offers features like code navigation, version control integration, and visual debugging tools.

6. Learning Curve: Learning Ansible requires understanding the YAML syntax, playbooks, and modules, as well as gaining knowledge of system administration concepts. On the other hand, mastering IntelliJ IDEA involves familiarizing oneself with the IDE's features, shortcuts, and tools tailored for software development. While Ansible may be more straightforward for system administrators, IntelliJ IDEA may offer a steeper learning curve for novice developers.

In Summary, Ansible and IntelliJ IDEA differ in their programming paradigms, use cases, language support, community ecosystems, user interfaces, and learning curves, making them distinct tools for configuration management and software development.