ΔE 9.3, close: similar, with a visible difference side by side. Moon Yellow is a little darker than C.P. Cadmium Yellow Medium.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Moon Yellow is a little darker than C.P. Cadmium Yellow Medium.
The same difference applies the other way round: C.P. Cadmium Yellow Medium is a little lighter.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See C.P. Cadmium Yellow Medium on the colour wheel See Moon Yellow on the colour wheel
All matches: C.P. Cadmium Yellow Medium equivalents · Moon Yellow equivalents