Why do some lenses produce more intense colors and contrast than other lenses?

In this case it is about Fuji lenses, but it could be also other brands. I don't understand how the XF 16mm f1.4 can produce more saturated colors and contrast, deeper blacks than the XF 35mm f2 for example. I take the 35mm f2 as a example as I do not have the 16mm f2.8 to compare.

Does anyone know the technical reason? How can I find out which lens has more saturation or deeper blacks? AI gives me conflicting answers.