The Insight and Prius are definitely competitors. Why would you compare a used car to a new car? The used car is going to be the better deal almost every single time (financially). For people looking at new vehicles these two are definitely going head to head.
I do find it very interesting though looking at the Insight vs Prius ACTUAL user mileage. Though there are only 3 users reporting, the Insight owners are actually beating the Prius C owners in mileage. Its also good to see both are beating the EPA rating. It'll be interesting to see as we get more Prius C owners here how things pan out with the EcoModder crowd.
