RAL 7008 Graugrün vs Sylvaneth Bark

How close are they?

ΔE 16.9, loose: different enough that you should pick on purpose. Sylvaneth Bark is a little darker, more muted, warmer than RAL 7008 Graugrün.

Can I use Sylvaneth Bark instead of RAL 7008 Graugrün?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Sylvaneth Bark is a little darker, more muted, warmer than RAL 7008 Graugrün.

Can I use RAL 7008 Graugrün instead of Sylvaneth Bark?

The same difference applies the other way round: RAL 7008 Graugrün is a little lighter, more saturated, cooler.

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.