This is a very good idea.
We’re all sitting in a bubble here - most of us have years of experience within Discourse and know its advantages well.
But our users see a wholly different view on their first visit.
I did some user testing a while ago. The first comment was “it just looks like an Excel spreadsheet.”
The advantages of Discourse don’t leap off the page. Many of them are invisible to casual users (like the moderation features, for example).
A comparison table with a few illustrations would go a long way.