Every home uses more or less the same type of matzos, as they are all made from the same recipe – flour and water and nothing else. When it comes to challah, every home uses a different recipe. Some use sweet challos, some eat egg challos, and so on. This suggests that on Pesach, everyone is the same: resha’im, tzaddikim, people of high levels, people of low levels, they are all equal in the sense that they can all gain from the Seder. ~ R’ Elimlech Biderman Shlita