One is a fried bread roll, that can also be stuffed, in the Cajun areas around Lafayette and Lake Charles.
The other is a type of submarine shaped bread about half the size of a baguette that is popular in New Orleans for Vietnamese bánh mì and other sandwiches.
[1] In France and Belgium, the word pistolet refers to a round roll.
[2] The Cajun stuffed and fried bread rolls often contain seafood such as crawfish or meat.
[3] The roll is split and filled or stuffed with seafood or meat, as well as other items sometimes including cheese or jalapeños.