ΔE 15.1, loose: different enough that you should pick on purpose. Tuskgor Fur is a little lighter, much more muted than Rotbraun RAL 8012.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Tuskgor Fur is a little lighter, much more muted than Rotbraun RAL 8012.
The same difference applies the other way round: Rotbraun RAL 8012 is a little darker, much 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.
See Rotbraun RAL 8012 on the colour wheel See Tuskgor Fur on the colour wheel
All matches: Rotbraun RAL 8012 equivalents · Tuskgor Fur equivalents