1. Data Modeling and Content Management: Strapi primarily focuses on providing a headless CMS solution, allowing users to model and manage content efficiently. On the other hand, Structr specializes in graph data modeling and management, making it ideal for applications that heavily rely on graph-based structures.

2. User Interface Customization: Strapi offers a highly customizable admin panel that allows users to tailor the interface to their specific needs and branding. In contrast, Structr provides a visually appealing user interface but may offer less customization options compared to Strapi.

3. Support for Plugins and Extensions: Strapi comes with a vast array of plugins and extensions that can enhance functionality and extend the platform's capabilities. Structr, on the other hand, may have a more limited selection of plugins, potentially impacting the extensibility of the platform.

4. Community and Documentation: Strapi has a large and active community, resulting in extensive documentation, resources, and community support. Structr may have a smaller community, which could mean fewer resources and support options available to users.

5. Performance and Scalability: Strapi is known for its performance and scalability, making it suitable for projects of various sizes. While Structr can also handle large-scale applications, its focus on graph data may impact performance in certain use cases compared to Strapi.

6. Deployment and Hosting Options: Strapi offers flexible deployment options, including self-hosting, cloud hosting, and one-click deployments on platforms like Heroku. Structr provides deployment options as well but may have a more limited selection compared to Strapi.

In Summary, Strapi excels in data modeling, content management, and customizability, while Structr specializes in graph data modeling and management, with potential limitations in community support and customization options.