ΔE 7.1, close: similar, with a visible difference side by side. Morghast Bone is a little darker, warmer than Rotten Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Morghast Bone is a little darker, warmer than Rotten Flesh.
The same difference applies the other way round: Rotten Flesh is a little lighter, 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 Rotten Flesh on the colour wheel See Morghast Bone on the colour wheel
All matches: Rotten Flesh equivalents · Morghast Bone equivalents