Tarots cards usually have 78 cards per deck, divided into major and minor arcana. Oracle cards can have as many as over 100 cards, or it can have way less cards. With Oracle cards the number of cards depends on the creator of the deck. Tarot cards tend to follow the classic deck of Tarot, which is Rider-Waite. So, while the colors and imagery of a Tarot deck may be different from each other, they tend to follow the same format, in terms of meanings and suites. Oracle deck meanings is defined by the creator and can widely vary.