1. Structure and Components: Nette Framework heavily relies on Dependency Injection and Convention over Configuration, leading to more flexible and maintainable code structures. Yii, on the other hand, follows the Model-View-Controller pattern strictly, making it easier for beginners to understand the codebase and work on projects with set rules and conventions.

2. Documentation and Community Support: Nette Framework lacks comprehensive documentation and has a smaller community compared to Yii, which offers extensive documentation, tutorials, forums, and a larger community for support and collaboration. This makes it easier for developers to find resources and help when working with Yii.

3. Performance and Scalability: Yii is known for its excellent performance and scalability, enabling developers to build large-scale applications efficiently. Nette Framework, while also capable of handling complex projects, may lag behind Yii in terms of performance optimizations and scalability features.

4. Code Generation and Code Completion: Yii provides robust code generation tools and code completion features, making development faster and more efficient. Nette Framework, although providing similar functionalities, may not have as extensive code generation and completion capabilities as Yii, leading to a slightly slower development process.

5. Extensions and Plugins: Yii offers a wide array of extensions and plugins through its official repository, facilitating the integration of third-party functionalities into projects. Nette Framework, while having some extensions available, may not have as diverse a collection as Yii, limiting the options for developers when looking to add extra features to their applications.

6. Learning Curve and Ease of Use: Nette Framework is known for its steeper learning curve, requiring developers to have a stronger grasp of advanced concepts to work effectively. Yii, with its more straightforward structure and conventions, is generally considered easier for beginners to learn and start working on projects quickly.

In Summary, Nette Framework and Yii differ in terms of structure and components, documentation and community support, performance and scalability, code generation and completion capabilities, availability of extensions and plugins, as well as the learning curve and ease of use for developers.