ΔE 7.5, close: similar, with a visible difference side by side. Fog Grey is a little lighter, warmer than AMT-7 Light Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Fog Grey is a little lighter, warmer than AMT-7 Light Blue.
The same difference applies the other way round: AMT-7 Light Blue is a little darker, 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 AMT-7 Light Blue on the colour wheel See Fog Grey on the colour wheel
All matches: AMT-7 Light Blue equivalents · Fog Grey equivalents