The two are really so close that for all intents and purposes they are equal. Driving style and driving conditions are probably going to have a bigger impact on your fuel economy than which car you choose. Based on such similar fuel economy, I would probably base a buying decision off of other factors, like how much you like the look and feel of each car.

Is the new HCH larger than the old version, or does the Prius still have a larger size (dis)advantage on it?