ΔE 11.8, fair: the same colour family, but not a straight swap. Reptilian Green is a little darker, more saturated, warmer than Stegadon Scale Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Reptilian Green is a little darker, more saturated, warmer than Stegadon Scale Green.
The same difference applies the other way round: Stegadon Scale Green is a little lighter, more muted, cooler.
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 Stegadon Scale Green on the colour wheel See Reptilian Green on the colour wheel
All matches: Stegadon Scale Green equivalents · Reptilian Green equivalents