ΔE 4.2, very close: most people won’t see a difference side by side. USAF Olive Drab is a little darker, warmer than Eidolon Grey.
Yes, for most jobs. Very close match (ΔE 4). USAF Olive Drab is a little darker, warmer than Eidolon Grey.
The same difference applies the other way round: Eidolon 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 Eidolon Grey on the colour wheel See USAF Olive Drab on the colour wheel
All matches: Eidolon Grey equivalents · USAF Olive Drab equivalents