[xaritas]

I'm not on the team, but I've used both. I would be interested in seeing both maintainer's answer to this, too.

At a high level, I can see how there might have been a bit of friction in trying to implement Wagtail on top of Mezzanine. Mezzanine's features, admin interface, and content model are fairly tightly integrated (I hope I'm not misrepresenting Mezzanine here, I think that this is an affirmative goal of the project). It provides a lot for the developer and the site admin out of the box—usable templates, basic page types, a blog, an image library. On the other hand, Wagtail core offers surprisingly little—the wagtaildemo project is a nice starting point for some basic content types, but it's just another user of the Wagtail API.

For me, the killer features of Wagtail are: deep integration with ElasticSearch, a moderation based workflow, content revision tracking, document library. It's feature list is like a love letter to institutional clients. However, that's a lot of code that is not integral to Mezzanine, and I don't think it fits with the maintainer's philosophy of "it's integrated, but not a kitchen sink." [Note: I made up this quote.]

To both maintainers, nice work, and thanks.