ΔE 9.7, close: similar, with a visible difference side by side. US Light Green is a little lighter, more muted than Dark Yellow Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). US Light Green is a little lighter, more muted than Dark Yellow Green.
The same difference applies the other way round: Dark Yellow Green is a little darker, more saturated.
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 Dark Yellow Green on the colour wheel See US Light Green on the colour wheel
All matches: Dark Yellow Green equivalents · US Light Green equivalents