Necroing a more than five years old thread, to say that...
It's not because this is what you are doing, and to be fair what half authors on the scene are doing, that it apply to everyone.
There's a really easy way to differentiate between the two. An author who know his story anticipate it.
Event always starts in the background, and can be seen there, or in the behavior of the characters who are already aware of them, way before they reach the MC, and therefore the player. Their characters also tend to have a stronger, and deeper, personality, and this personality match the scenes they'll be involved in.
Things will happen and, even when you haven't see them come, you'll not be totally surprised because suddenly everything make sense.
Hmm, really ?
The DeLuca Family,
Where the Heart Is,
Karlsson's Gambit,
Bad Memories,
Fetish Locator, to just name five that cross my mind right now, all bad and not loved games without a single doubt. And what about
Love and Submission, still loved and missed so many years after shit hit Veqvil life, forcing him to abandon it.
The fact is that games have more chance to succeed when the author know precisely what story he is telling. By itself this improve the inherent qualities of the game, make the writing more coherent, and contribute to the interest players will have for the game. You started playing out of curiosity, you continue to play because you are, consciously or not, teased about what will be coming next.
Edit: Too obvious typo.