https://www.buyatoyota.com/home/compare/2018_Prius_vs_2018_IONIQ.page - The engine is just like the prius comparison conventional however yields a slightly decreased fuel efficiency due to the much larger construct. Prime could be the premium model with the line. Its high fuel efficiency keeps it before the other models. Furthermore, it is the only real Prius which may run exclusively within an all electric version. The main variation involving Prius and also Prius do lies in the search engine fuel and power economy.