I don't think "I feel confident" is any different from "I have confidence", and both are a risk-moderated version of "I have knowledge".

This makes me think that you must be a hyperrational person. I would say that confidence is a long way from a risk-moderated version of "I have knowledge". I rarely feel confident, despite generally having good odds, and the degree to which I feel confident rarely bears much relation to the odds that I would attribute to a situation. Your sense of confidence, I assume, must correlate much more closely with your rationally attributed odds than mine does.