Zuko is different in many ways. One, he followed his true destiny, unlike many people who do not. This is mostly due to the influence of Iroh. Secondly, he is knowledgeable in the real art of Firebending, as taught by the dragons. This means that he sees fire as life, as opposed to just death and destruction. Thirdly, he is one of the few benders known to be able to redirect lightning, a feat only seen done by three characters.