They both have similar approaches, they can both change people by giving them food, the food behaves like code and changes the way they bahave, and they both talk in riddles and cause people to do things by manipulating them. They are also both able to see future events.
I thought a few times that the Oracle is the new version of the Merovingian, he was from the old version of the Matrix but he tricked the system into not deleting him when the old Matrix was ended.
The Merovingian is the old version of the Oracle, and the Oracle is an architect software that helped to create the present active matrix. I'm not saying that is official story, only a possibility. I thought that a few times.
