1. 1. Declarative vs. Imperative Programming Paradigm: React Native follows a declarative programming paradigm, which means developers describe what the UI should look like, and the framework takes care of updating the UI based on the underlying data changes. On the other hand, Kivy follows an imperative programming paradigm, where developers directly specify the steps required to achieve the desired UI behavior. This makes React Native code more concise and easier to maintain compared to Kivy.

2. 2. Language Used: React Native is primarily written in JavaScript, which is a widely-used and popular programming language. Kivy, on the other hand, uses Python, which is also a widely-used language with a large community. However, JavaScript is more commonly used in web and mobile development, giving React Native an advantage in terms of available resources and community support.

3. 3. Platform-specific Components: React Native uses platform-specific components, which means that the UI components used in the app will look and behave like native components of the platform on which the app is running. This provides a more native-like experience to the users. Kivy, on the other hand, uses its own proprietary set of UI components, which may not have the same appearance or behavior as the native components. This can sometimes result in a less intuitive or consistent user experience.

4. 4. Performance: In terms of performance, React Native can be faster than Kivy in certain scenarios. React Native uses a bridge to communicate between the JavaScript code and the native code, which can introduce some overhead. However, React Native's bridge has been optimized over time, and it performs well in most cases. Kivy, on the other hand, is a more lightweight framework and provides better performance in graphics-intensive applications.

5. 5. Development Speed: React Native offers a faster development speed compared to Kivy. With React Native, developers can write code once and deploy it on both iOS and Android platforms, which reduces the development time and effort. Kivy, on the other hand, requires separate codebases for each platform, which increases the development time and maintenance effort.

6. 6. Community and Ecosystem: React Native has a larger and more active community compared to Kivy. It has a wide range of open-source libraries, tools, and resources available, which makes it easier for developers to find solutions to problems and enhance their applications. Kivy also has a supportive community, but it is relatively smaller and has a more limited ecosystem compared to React Native.

In summary, React Native follows a declarative programming paradigm, uses JavaScript as its primary language, provides native-like components, has good performance, offers faster development speed with code sharing across platforms, and has a larger community and ecosystem compared to Kivy.