Are the Parasite Worms and the Mushroom Bugs supposed to be the same thing? They have different names and colors, but they dont really seem to act or look differently during any sleeping scenes, nor do they give any different effects or dialog. They are also basically the same thing according to the status menu.
Anyways, it was just something i was curious about since they are clearly somewhat different from each other according to the text, but dont really do anything else that sets them apart.