Color noise and Chroma noise- the same thing?

Why does it use the word COLOR NOISE and CHROMA NOISE in RemovNoise tool in Fusion, bcoz most us know that they both are the same thing. We have Luminance Noise and Color/Chroma Noise. Color Noise and Chroma Noise is used interchangeably but NOT separately, they are the same thing. Its confusing that RemovNoise tool in Fusion uses COLOR NOISE and CHROMA NOISE.

SCREENSHOT

Chroma is a component of a YCrCb color space, specifically Cr and Cb. By itself, it cannot display a specific color. It needs the other components in order to do so. So the math between color and chroma is quite different though there is a large overlap even in abstraction.