ΔE 11.7, fair: the same colour family, but not a straight swap. Gauss Blaster Green is a little lighter, more saturated, cooler than Autumn Sage.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Gauss Blaster Green is a little lighter, more saturated, cooler than Autumn Sage.
The same difference applies the other way round: Autumn Sage is a little darker, 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 Autumn Sage on the colour wheel See Gauss Blaster Green on the colour wheel
All matches: Autumn Sage equivalents · Gauss Blaster Green equivalents