a. The comedian jokingly told the audience to never trust someone who said their ideal superpower is invisibility. 和 b. The comedian jokingly told the audience never to trust someone who said their ideal superpower is invisibility. 的差別在哪裡？如果不好說明，請提供一些例句。

Your version of the sentence is perfectly fine as well, and I would argue that it's also more natural since it's shorter and English speakers tend to like shorter speech. I don't think there's a difference in nuance between the two sentences that's important enough that someone's reaction to the sentence would change. :)