ΔE 28.1, loose: different enough that you should pick on purpose. Jade Green is a little lighter, much more saturated, cooler than Grey Teal.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Jade Green is a little lighter, much more saturated, cooler than Grey Teal.
The same difference applies the other way round: Grey Teal 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 Grey Teal on the colour wheel See Jade Green on the colour wheel
All matches: Grey Teal equivalents · Jade Green equivalents