Should JCh use chroma and hue in CIECAM02-UCS opposed to CIECAM02?

[connorgr]

The current implementation of d3-cam02 implements JCh in CIECAM02 whereas Jab is implemented in CIECAM02-UCS. Is this necessary? Can CIECAM02-UCS be used for both?

Right now J is not equivalent in the two functions, which I think is likely to cause unintentional user error. I don't have enough color science expertise to know whether CIECAM02-UCS supports the same set of specifications as CIECAM02 (e.g., C, H, h, Q, M, etc.). Input with someone who is more familiar with color science would be tremendously helpful.