ΔE 24.4, loose: different enough that you should pick on purpose. Amber Green is much more saturated, cooler than True Brass.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Amber Green is much more saturated, cooler than True Brass.
The same difference applies the other way round: True Brass is much more muted, warmer.
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 True Brass on the colour wheel See Amber Green on the colour wheel
All matches: True Brass equivalents · Amber Green equivalents