I want to replace my fuel filter and i went to the powerstrokeshop.com cause everyone else wants a ton of money for these filters. The pss.com has 2 different filter options and i'm a little confused

. One is 28 bucks and one is 17 bucks and both have the 4596 part number only on is FD4596 and one is F4596. Does anyone know which one i need or is there a difference? They both just say fuel filter too, its not like one says that there is something different about it.