Eshin Grey vs Medium Brown

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Medium Brown is a little darker, more saturated than Eshin Grey.

Can I use Medium Brown instead of Eshin Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Medium Brown is a little darker, more saturated than Eshin Grey.

Can I use Eshin Grey instead of Medium Brown?

The same difference applies the other way round: Eshin Grey is a little lighter, more muted.

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.