Green sauce is used to make green sweet soup (I'm sorry I can't play Thai now ...), and the food tastes sweet and spicy.
Yellow is used to make more meat dishes. Personally, I prefer to eat chicken made from it ~ I forget the name.
The red one is for shadow work in winter, right? It's the kind that costs more than 80 baht a bottle. It tastes just right, which is more suitable for China people's taste.