The advantage that the phylogenic classification system has over the Linnaean system is B. the phylogenetic system defines each organism as a plant or animal. The Linnaean system does not. This is a huge drawback to the Linnaean system, especially when it comes to those cases when it is uncertain whether an organism is a plant or an animal. The phylogenic system will write down that distinction, which is its advantage over the Linnaean system.