ΔE 9.0, close: similar, with a visible difference side by side. Yellow Olive is a little lighter, more muted than Deep Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Yellow Olive is a little lighter, more muted than Deep Green.
The same difference applies the other way round: Deep 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 Deep Green on the colour wheel See Yellow Olive on the colour wheel
All matches: Deep Green equivalents · Yellow Olive equivalents