ΔE 7.5, close: similar, with a visible difference side by side. Tanker Grey is a little lighter, more saturated than M-485 Blue-Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Tanker Grey is a little lighter, more saturated than M-485 Blue-Grey.
The same difference applies the other way round: M-485 Blue-Grey is a little darker, more muted.
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 M-485 Blue-Grey on the colour wheel See Tanker Grey on the colour wheel
All matches: M-485 Blue-Grey equivalents · Tanker Grey equivalents