First Draft is an interactive epistolary story I built with Liza Daly, with subsequent design work by inkle. Set in the universe of the Lavori d’Aracne, it tells a story from the beginnings of that universe’s French Revolution, when certain anti-aristocratic forces are finally discovering how to break the magical power that has kept the nobility in power for so long.
For those interested in the concept of interactive epistolary story, there’s a fairly long author’s note on the website. This bit may suggest how First Draft compares with choice-based narrative:
[I]nteractively revising text involves multiple simultaneous choices which influence one another. Instead of asking the reader “then what did the character do?” or “what happened next?”—as choose your own adventure stories do—First Draft of the Revolution asks the reader to consider a number of simultaneous decisions, try them out, take some of them back, and finally settle on an acceptable version before moving on.
inkle’s blog also contains some discussion on the technical implementation.