ΔE 7.3, close: similar, with a visible difference side by side. Skeleton Bone is a little lighter, more muted, warmer than Ochre.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Skeleton Bone is a little lighter, more muted, warmer than Ochre.
The same difference applies the other way round: Ochre is a little darker, more saturated, cooler.
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 Ochre on the colour wheel See Skeleton Bone on the colour wheel
All matches: Ochre equivalents · Skeleton Bone equivalents