ΔE 16.8, loose: different enough that you should pick on purpose. Aircraft Gray Green BS283 is a little lighter, much more muted, cooler than Loren Forest.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Aircraft Gray Green BS283 is a little lighter, much more muted, cooler than Loren Forest.
The same difference applies the other way round: Loren Forest is a little darker, much 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 Loren Forest on the colour wheel See Aircraft Gray Green BS283 on the colour wheel
All matches: Loren Forest equivalents · Aircraft Gray Green BS283 equivalents