ΔE 6.4, close: similar, with a visible difference side by side. Light Mustard Khaki is a little lighter than Pale Yellow Green FS-33481.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Light Mustard Khaki is a little lighter than Pale Yellow Green FS-33481.
The same difference applies the other way round: Pale Yellow Green FS-33481 is a little darker.
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 Pale Yellow Green FS-33481 on the colour wheel See Light Mustard Khaki on the colour wheel
All matches: Pale Yellow Green FS-33481 equivalents · Light Mustard Khaki equivalents