ΔE 16.1, loose: different enough that you should pick on purpose. Bright Green is more muted, cooler than Bog Moss.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Bright Green is more muted, cooler than Bog Moss.
The same difference applies the other way round: Bog Moss is more saturated, 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 Bog Moss on the colour wheel See Bright Green on the colour wheel
All matches: Bog Moss equivalents · Bright Green equivalents