For some time, the Toyota Prius has enjoyed “king of the hill” status when it comes to fuel efficiency. However, the Prius now has to share that title with … itself: the 2012 Prius c hatchback. Unlike the futuristic-looking conventional Prius, the smaller Prius c is billed as more of an everyday driver, according to Cars.com’s Managing Editor David Thomas. So how does the c stack up against a conventionally powered subcompact commuter car?