ΔE 6.2, close: similar, with a visible difference side by side. Middle Stone is a little lighter than RAL 8000 Gelbbraun.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Middle Stone is a little lighter than RAL 8000 Gelbbraun.
The same difference applies the other way round: RAL 8000 Gelbbraun is a little darker.
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.
See RAL 8000 Gelbbraun on the colour wheel See Middle Stone on the colour wheel
All matches: RAL 8000 Gelbbraun equivalents · Middle Stone equivalents