That comparison has its' flaws. It all depends on how many miles are driven per year, and in the case of the Prius, there is no model that is not a Hybrid.
It all depends on how much you drive. If I didn't drive 600 miles a week, I wouldn't have a Prius, though I do like the car.
As much as I drive, I save 15 gallons a week, figuring I average 50 mpg (55 in the summer, 45 in winter.) This is comparing it to my last car that got 22mpg.
15 X $2.69 a gallon for regular = $2098 per year.
When it was $4.19 a gallon, I was saving $62 bucks a week.
I'm saving so much on gas, the Prius "bought" me a new Goldwing!