Ask HN: Are Dunning-Kruger and imposter syndrome related?

It occurs to me that the Dunning-Kruger effect and imposter syndrome are like mirror images of each other. One is to see yourself as more competent than you are in areas that you know little about; the other is to see yourself as less competent than you are in areas that you know a large amount about. (In both cases, the better alternative is to evaluate yourself accurately.)

Are these things the opposite sides of the same coin? Are they the opposite ends of a spectrum of "the more you know, the more you know you don't know"? Or is the inverse similarity between them just superficial, and there is no relationship between them?