These are two different kinds of waffles, but they are both delicious! Belgian waffles tend to be thicker and have bigger, deeper pockets due to using yeast in the recipe. Buttermilk waffles are still fluffy, but have a slightly different texture since you do not include yeast. As a result, buttermilk waffles have a more pancake-like batter. Both are delicious, and can be topped with a variety of sweet and decadent ingredients!