ΔE 7.8, close: similar, with a visible difference side by side. Gunship Gray is a little darker, cooler than Tanker Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Gunship Gray is a little darker, cooler than Tanker Grey.
The same difference applies the other way round: Tanker Grey 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 Tanker Grey on the colour wheel See Gunship Gray on the colour wheel
All matches: Tanker Grey equivalents · Gunship Gray equivalents