po boys are similar. The bread has a similar texture but a slightly different flavor. The toppings are usually quite different. Popular fillings for po' boys include fried oysters, shrimp, ham, beef, or boudin. They often use Creole mustard, hot sauce, sometimes Louisiana remoulade.

While there is a big Vietnamese presence in New Orleans, the po' boy didn't stem from the bahn mi. I would bet that the common French influence on both regions had something to do with their evolution, though.