The former is way more viable to convey in VN format, if only because the choices and routes have practically been prewritten already.
Not exactly. :V
Taking CDO for an example- Most of the times, even if you choose an irregular choice, the story simply wraps around that choice. There are exceptionally few ways to truly mess things up in RPG stories that aren't 'You attack GOD like an idiot, and as such, die.' We really still have to add in the bad choices that lead to unfavorable ends.
Hell, Even taking examples like Barren Path, where we DID choose the 'fail like morons option', the story wrapped to that. (See: Waking up in Kourindou.) The dynamic, amusingly, kills the advantage it'd perceivably have.
That said, it is easy to add 'bad' options by theorizing 'IF you guys did this, this would happen and shit goes down', you could always do the same with static fiction. (See: And the Utsuho never happen)
I do admit it may be easier to see 'Choice' points, though. You also have to figure out what to trim out, what to keep, and what to take as granted. At that, you also may want to spice it up a bit. You also have to deal with the MC now being more than a simple 'mouth' for the players, perhaps, sprucing up a fitting personality.
Arguably, Its even more work, because its missing the real 'Novel' part of Visual Novel.
C'mon Chaore! Give it the go ahead!
The idea is tempting, But being the somewhat selfish man I am, would want to compile the story myself. I'm not sure I'm capable of finding the time. At that, CDO isn't anywhere near the point I'd find something like this fitting. After all, there is a rather long path still ahead of you all.
If I do take on the task, I'll probably wait until I've managed to finish CDO, which looks like it could take quite a while.