DuckRails vs Rest.li: What are the differences?

Developers describe DuckRails as "Open source development tool for mocking API endpoints". DuckRails is an open source development tool that helps developer mock API endpoints quickly & dynamically outside the application code. On the other hand, Rest.li is detailed as "A REST+JSON framework for robust, scalable service architectures, by LinkedIn". Rest.li is an open source REST framework for building robust, scalable RESTful architectures using type-safe bindings and asynchronous, non-blocking IO. Rest.li fills a niche for applying RESTful principals at scale with an end-to-end developer workflow for buildings REST APIs that promotes clean REST practices, uniform interface design and consistent data modeling.

DuckRails and Rest.li can be categorized as "API" tools.

DuckRails and Rest.li are both open source tools. Rest.li with 1.94K GitHub stars and 392 forks on GitHub appears to be more popular than DuckRails with 1.59K GitHub stars and 84 GitHub forks.