Nothing....they are the same. Some believe that if it's cooked inside the bird, it should be called stuffing, while others believe that if its cooked outside the bird, then it should be called dressing.
Other times it comes down to location. In the South, cooks will call it dressing and New Englanders generally refer to this dish as stuffing. I'm from Wisconsin, and my family has always called it dressing.
Whether you call it stuffing or dressing it's really a matter of choice or a matter of your family's preference. Sometimes it comes down to tradition.....just like so many other dishes served for Thanksgiving Dinner. We can all call it one thing for sure.......Delicious!
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