ΔE 16.3, loose: different enough that you should pick on purpose. Tuskgor Fur is more muted, cooler than Mushroom Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Tuskgor Fur is more muted, cooler than Mushroom Brown.
The same difference applies the other way round: Mushroom Brown is more saturated, 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 Mushroom Brown on the colour wheel See Tuskgor Fur on the colour wheel
All matches: Mushroom Brown equivalents · Tuskgor Fur equivalents