ΔE 6.6, close: similar, with a visible difference side by side. Gray Violet is a little lighter, more muted than 82nd All the Way.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Gray Violet is a little lighter, more muted than 82nd All the Way.
The same difference applies the other way round: 82nd All the Way is a little darker, more saturated.
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 82nd All the Way on the colour wheel See Gray Violet on the colour wheel
All matches: 82nd All the Way equivalents · Gray Violet equivalents