ΔE 9.8, close: similar, with a visible difference side by side. Tanker Grey is a little lighter, warmer than Ocean Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Tanker Grey is a little lighter, warmer than Ocean Grey.
The same difference applies the other way round: Ocean Grey 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 Ocean Grey on the colour wheel See Tanker Grey on the colour wheel
All matches: Ocean Grey equivalents · Tanker Grey equivalents