ΔE 11.0, fair: the same colour family, but not a straight swap. Dryad Bark is noticeably darker than Matt Earth FS-34088.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dryad Bark is noticeably darker than Matt Earth FS-34088.
The same difference applies the other way round: Matt Earth FS-34088 is noticeably lighter.
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 Matt Earth FS-34088 on the colour wheel See Dryad Bark on the colour wheel
All matches: Matt Earth FS-34088 equivalents · Dryad Bark equivalents