Hi, yes I use Twine now and this version is much more advanced than the one on Dashingdon. There's also a tab where you can find side stories.
Do as you like. The Twine version is being reworked bit by bit, so you'll get even more novelty when you read it. For the moment I've only rewritten the prologue and the beginning of the 1st chapter. And I can't remember where dashingdon's version ends but I think there's an addition of maybe 40k on Twine's version.