ΔE 9.2, close: similar, with a visible difference side by side. Inktense Wood is a little darker than Martian Ironcrust. They are different kinds of paint: Citadel Martian Ironcrust is a technical paint or medium and Scale75 Inktense Wood is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Inktense Wood is a little darker than Martian Ironcrust. They are different kinds of paint.
The same difference applies the other way round: Martian Ironcrust is a little 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 Martian Ironcrust on the colour wheel See Inktense Wood on the colour wheel
All matches: Martian Ironcrust equivalents · Inktense Wood equivalents