We encourage our users to test 'crazy' ideas on edge, and while there are great overviews of the differences between edx.org/edge.edx.org, I don't think we have an item-by-item list. This has discouraged some teams from testing, since they 'don't know what the differences are, so I don't know if my tests are valid."
Here's a sample response I've used in support, and it would be great to build out the item-by-item list. It could also manage expectations of course teams who, say, want to use the course on campus, but are surprised email is not available.
>The course "Creating a Course with edX Studio" has a good general overview of edge versus edX: https://www.edx.org/course/creating-course-edx-studio-edx-studiox
>The specific unit is: https://courses.edx.org/courses/course-v1:edX+StudioX+2015/courseware/170f56e7c2bf4b8ebd97902b8e346715/25bb77f6c24f4ee3b25113612487d57b/3
>There isn't a feature-by-feature listing of differences, but as the overview explains, the gist is that edge courses do not have the features to support large, public courses.
+ Edge courses do not provide bulk email to instructors.
+ Edge courses do not provide certificates.
+ Edge courses must manage the design and content of their own enrollment pages via Schedule & Details, and the enrollment pages are not listed in a public catalog.
+ Edge courses do not provide a video upload workflow via Studio, and cannot use video IDs created via upload in edx.org
+ For the purposes of 3rd party tools and permissions: edge.edx.org is a different domain from edx.org.
> Problems, exercises, and all other content should behave the same on edX.org and edge.edx.org. If you are integrating a 3rd-party, off-platform tool into the course, you may need to configure your tool to accept pings from edge.edx.org as well as edx.org.
(Also, CCX is an edge-only feature, but that's not mentioned elsewhere in the documentation.)