1. Template Structure: CouchCMS uses PHP-based template where the dynamic content is embedded directly into HTML. On the other hand, Storyblok separates content from the design by using a headless CMS, allowing developers to build websites using any technology or framework.

2. Customization Options: CouchCMS offers limited customization options compared to Storyblok, which provides a high level of flexibility for developers to create custom fields, components, and entire content structures according to their specific needs.

3. User Interface: CouchCMS has a simple and straightforward admin panel, suitable for beginners or those who prefer minimalistic interfaces. Conversely, Storyblok features a modern and intuitive visual editor with drag-and-drop functionality, making it easier for users to manage content efficiently.

4. Collaboration Tools: Storyblok offers advanced collaboration tools such as role-based permissions, content versioning, and content locking, enabling multiple users to collaborate seamlessly on content creation and editing. In contrast, CouchCMS lacks these collaborative features.

5. Scalability: Storyblok is designed to handle large-scale projects with ease, providing robust APIs and integrations for managing vast amounts of content. On the other hand, CouchCMS may face limitations when managing complex and high-traffic websites due to its architecture.

6. Support and Community: Storyblok has a dedicated support team, extensive documentation, and an active community forum, ensuring users receive timely assistance and resources. While CouchCMS also offers support, the level of community engagement and resources may be comparatively lower.

In Summary, the key differences between CouchCMS and Storyblok lie in their template structure, customization options, user interface, collaboration tools, scalability, and support resources.