ΔE 20.1, loose: different enough that you should pick on purpose. Transparent Phthalo Green (Blue Shade) is noticeably lighter, more saturated than Kabalite Green. They are different kinds of paint: Citadel Kabalite Green is an opaque base/layer paint and Golden Transparent Phthalo Green (Blue 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 20). Transparent Phthalo Green (Blue Shade) is noticeably lighter, more saturated than Kabalite Green. They are different kinds of paint.
The same difference applies the other way round: Kabalite Green is noticeably 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 Kabalite Green on the colour wheel See Transparent Phthalo Green (Blue Shade) on the colour wheel
All matches: Kabalite Green equivalents · Transparent Phthalo Green (Blue Shade) equivalents