ΔE 11.8, fair: the same colour family, but not a straight swap. 82nd All the Way is a little darker than Regiment Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). 82nd All the Way is a little darker than Regiment Grey.
The same difference applies the other way round: Regiment Grey is a little lighter.
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 Regiment Grey on the colour wheel See 82nd All the Way on the colour wheel
All matches: Regiment Grey equivalents · 82nd All the Way equivalents