ΔE 9.6, close: similar, with a visible difference side by side. UK Light Stone is more muted, warmer than Light Soviet Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). UK Light Stone is more muted, warmer than Light Soviet Khaki.
The same difference applies the other way round: Light Soviet Khaki is 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 Light Soviet Khaki on the colour wheel See UK Light Stone on the colour wheel
All matches: Light Soviet Khaki equivalents · UK Light Stone equivalents