This game has a 20$ version which has extra scenes, what kind of scenes are they? are they like every other event in the game (quest>buildup>scene) or are they something different? like extra scenes only available in the recollection room?
They're exactly as the name suggests, extra scenes. They're inserted within the story where there could be room for a sex scene.
One example would be : during the forest elves arc, Edwyr, one of the antagonists, duels one of the forest elf. While the nornal story skips over the duel and then it is said he won, in the extra scene version you can see the scene where he wins and fucks her afterwards. There's no extra quest or anything, everything happens during already existing cutscenes that are made a bit longer by having more scenes that wouldn't be there in the base game.