ΔE 15.2, loose: different enough that you should pick on purpose. Phthalo Green (Yellow Shade) is a little lighter, much more saturated, cooler than Athonian Camoshade. They are different kinds of paint: Citadel Athonian Camoshade is a wash/shade and Golden Phthalo Green (Yellow Shade) is an ink, glaze or transparent 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). Phthalo Green (Yellow Shade) is a little lighter, much more saturated, cooler than Athonian Camoshade. They are different kinds of paint.
The same difference applies the other way round: Athonian Camoshade is a little darker, much more muted, 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 Athonian Camoshade on the colour wheel See Phthalo Green (Yellow Shade) on the colour wheel
All matches: Athonian Camoshade equivalents · Phthalo Green (Yellow Shade) equivalents