In the credit risk review for FRM L2, David talks about Economic Capital & Credit VaR. I know EC is a multiple of UL given that UL is one sigma around EL. However, there are two formulas used, CVaR is the quantile - EL whereas Economic Capital is mean + UL * sigma. And I recall that in some of the credit risk questions, unlike market risk, credit risk is in the right tail and this is why we add the mean instead of subtract. So I'm trying to figure out which is the calculation for Economic Capital and which is CVaR or can they be used interchangeably? Thank you.