ΔE 8.8, close: similar, with a visible difference side by side. IAF Sand is a little lighter, cooler than Temple Stone.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). IAF Sand is a little lighter, cooler than Temple Stone.
The same difference applies the other way round: Temple Stone 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 Temple Stone on the colour wheel See IAF Sand on the colour wheel
All matches: Temple Stone equivalents · IAF Sand equivalents