Graugrün RLM 74 vs Eshin Grey

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Eshin Grey is more muted than Graugrün RLM 74.

Can I use Eshin Grey instead of Graugrün RLM 74?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Eshin Grey is more muted than Graugrün RLM 74.

Can I use Graugrün RLM 74 instead of Eshin Grey?

The same difference applies the other way round: Graugrün RLM 74 is 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.