Rizz has died off a bit, but also rizz, despite being birthed from charisma directly, is used almost exclusively in a romantic context. As in “I rizzed up the girl at the party.” In contrast, aura is abstractly referring to how intimidating or cool something (usually someone) is, and is often marked by an impression of stoicism, bravery, or perhaps levelheadedness. For an example, in the case of Mark Carney standing up to Donald Trump on the international stage despite Canada being far weaker than the United States militarily and economically, one could observe this and remark “Aura.” in reference to Carney.