Military Shader vs Agrax Earthshade

How close are they?

ΔE 21.7, loose: different enough that you should pick on purpose. Agrax Earthshade is a little darker, much more muted, warmer than Military Shader.

Can I use Agrax Earthshade instead of Military Shader?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Agrax Earthshade is a little darker, much more muted, warmer than Military Shader.

Can I use Military Shader instead of Agrax Earthshade?

The same difference applies the other way round: Military Shader is a little lighter, much more saturated, 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.