ΔE 12.4, fair: the same colour family, but not a straight swap. AMT-1 Lt. Grey. Brown is a little lighter, more muted than Earth Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). AMT-1 Lt. Grey. Brown is a little lighter, more muted than Earth Brown.
The same difference applies the other way round: Earth Brown 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 Earth Brown on the colour wheel See AMT-1 Lt. Grey. Brown on the colour wheel
All matches: Earth Brown equivalents · AMT-1 Lt. Grey. Brown equivalents