ΔE 18.3, loose: different enough that you should pick on purpose. Reptilian Green is noticeably darker, warmer than Dewpath.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Reptilian Green is noticeably darker, warmer than Dewpath.
The same difference applies the other way round: Dewpath is noticeably lighter, 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 Dewpath on the colour wheel See Reptilian Green on the colour wheel
All matches: Dewpath equivalents · Reptilian Green equivalents