ΔE 15.3, loose: different enough that you should pick on purpose. Jenkins Green is a little darker, much more muted than Biel-Tan Green. They are different kinds of paint: Citadel Biel-Tan Green is a wash/shade and Golden Jenkins Green is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Jenkins Green is a little darker, much more muted than Biel-Tan Green. They are different kinds of paint.
The same difference applies the other way round: Biel-Tan Green is a little lighter, much more saturated.
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 Biel-Tan Green on the colour wheel See Jenkins Green on the colour wheel
All matches: Biel-Tan Green equivalents · Jenkins Green equivalents