Rotbraun RAL 8012 vs Mephiston Red

How close are they?

ΔE 8.0, close: similar, with a visible difference side by side. Mephiston Red is a little darker than Rotbraun RAL 8012.

Can I use Mephiston Red instead of Rotbraun RAL 8012?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Mephiston Red is a little darker than Rotbraun RAL 8012.

Can I use Rotbraun RAL 8012 instead of Mephiston Red?

The same difference applies the other way round: Rotbraun RAL 8012 is a little lighter.

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.