What's the difference between Yi Shu of Plum Blossom and Six hexagrams of Zhouyi?

The method of divination in The Book of Changes of Plum Blossoms is flexible and changeable, and it can be divined by means of sound, time, orientation and characters. Moreover, there is only one motive that is conducive to judgment. The way to break is to use words or divination to break. Six hexagrams method but one, I mean the ancient method of six hexagrams in Han dynasty (the method of modernism needs to be verified), which only uses copper coins to shake hexagrams, but there can be many actions or no actions. The complexity of the method is mainly judged by the restraint of soil branch and five elements. Compared with the plum blossom method, the development result of things is more detailed and concrete.