The reason for price difference is called smart marketing. The majority of the press that the Fiesta has recieved has been for the hatch. In order to give the sedan any chance of surviving was to make it more price friendly for entry level buyers that want a new car but can't spring for the higher and I sure what will be a more popular version of the Fiesta. Or for some people that just would prefer to drive a sedan rather than a hatch.
If you look at the 2008 Focus when it came out the 2 door sedan was actually cheaper than the 4 door sedan. I just checked on the build and price site and now the 2 door base price is higher than the 4 door. Why because people bought the 2 door because of price or because they liked the body style better and Ford adjusted the pricing accordingly based on demand.
If the sedan sells more based on the price I am sure that the price will go up closer to the hatch base price in a year or two.
As I have written in another post about the pricing of the car everyone should go to other B class car build and price sites and compare the Fiesta pricing to the others and then compare the equipment and then see which is the better deal. I believe that the equipment and features that you get on the Fiesta is better than any of them.Other people may come to a different conclusion but that is there right and they are welcome to compare the two and make their choice.
Just know that I will be driving a black 2011 Ford Fiesta SES with intellegent access with pushbutton start,six speed automatic trans,leather seating,SYNC 3.0 with Traffic,direction and information,heated seats and mirrors,turn signals on mirrors,autodimming rearview mirror,power door locks,mirrors and windows,cruise control,rear hatch spoiler,16 inch wheels and a lot of other things that the others can't touch.
So make you choice and enjoy.