ΔE 7.1, close: similar, with a visible difference side by side. Dirt is a little lighter, more muted than Rootpath.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dirt is a little lighter, more muted than Rootpath.
The same difference applies the other way round: Rootpath is a little darker, more saturated.
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 Rootpath on the colour wheel See Dirt on the colour wheel
All matches: Rootpath equivalents · Dirt equivalents