ΔE 7.5, close: similar, with a visible difference side by side. IAF Sand is a little darker, cooler than Deck Tan.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). IAF Sand is a little darker, cooler than Deck Tan.
The same difference applies the other way round: Deck Tan is a little lighter, 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 Deck Tan on the colour wheel See IAF Sand on the colour wheel
All matches: Deck Tan equivalents · IAF Sand equivalents