RAL 6011B Resedagrün vs Straken Green

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Straken Green is more saturated, cooler than RAL 6011B Resedagrün.

Can I use Straken Green instead of RAL 6011B Resedagrün?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Straken Green is more saturated, cooler than RAL 6011B Resedagrün.

Can I use RAL 6011B Resedagrün instead of Straken Green?

The same difference applies the other way round: RAL 6011B Resedagrün is more muted, warmer.

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.