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