While a hefeweizen is a form of weiss beer, or white beer in German, Hoegaarden is done in a Belgian witbier style. Both hefeweizens and witbiers use at least 50 percent wheat in the brew. Witbiers and hefeweizen beers also come out hazy. However, they diverge at the yeast strains used (Belgian vs. Bavarian strains) and also the flavor notes that appear. A hefeweizen is going to almost always taste of banana and clove, whereas a witbier will have more citrus and coriander. So, since Hoegaarden is made with Belgian yeast, it is considered a witbier, not a hefeweizen.