ΔE 16.0, loose: different enough that you should pick on purpose. Teal is noticeably lighter, cooler than Terradon Turquoise. They are different kinds of paint: Citadel Terradon Turquoise is a one-coat contrast-style paint and Golden Teal 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 16). Teal is noticeably lighter, cooler than Terradon Turquoise. They are different kinds of paint.
The same difference applies the other way round: Terradon Turquoise is noticeably darker, 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 Terradon Turquoise on the colour wheel See Teal on the colour wheel
All matches: Terradon Turquoise equivalents · Teal equivalents