ΔE 9.3, close: similar, with a visible difference side by side. Bright Green is a little lighter, more saturated than Ogre Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bright Green is a little lighter, more saturated than Ogre Green.
The same difference applies the other way round: Ogre Green is a little darker, more muted.
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 Ogre Green on the colour wheel See Bright Green on the colour wheel
All matches: Ogre Green equivalents · Bright Green equivalents