ΔE 8.1, close: similar, with a visible difference side by side. Karak Stone is a little lighter, cooler than Mid DAK Sand.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Karak Stone is a little lighter, cooler than Mid DAK Sand.
The same difference applies the other way round: Mid DAK Sand 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 Mid DAK Sand on the colour wheel See Karak Stone on the colour wheel
All matches: Mid DAK Sand equivalents · Karak Stone equivalents