ΔE 6.0, close: similar, with a visible difference side by side. Oak Brown is a little lighter, cooler than RAL 8017 Rotbraun.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Oak Brown is a little lighter, cooler than RAL 8017 Rotbraun.
The same difference applies the other way round: RAL 8017 Rotbraun is a little darker, 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.
See RAL 8017 Rotbraun on the colour wheel See Oak Brown on the colour wheel
All matches: RAL 8017 Rotbraun equivalents · Oak Brown equivalents