ΔE 6.2, close: similar, with a visible difference side by side. Yellow Olive is a little darker, more muted than Dark Green 3414.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Yellow Olive is a little darker, more muted than Dark Green 3414.
The same difference applies the other way round: Dark Green 3414 is a little lighter, 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 Green 3414 on the colour wheel See Yellow Olive on the colour wheel
All matches: Dark Green 3414 equivalents · Yellow Olive equivalents