ΔE 10.1, fair: the same colour family, but not a straight swap. Inktense Ochre is a little darker, warmer than Barren Yellow. They are different kinds of paint: Army Painter Barren Yellow is an opaque base/layer paint and Scale75 Inktense Ochre is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Inktense Ochre is a little darker, warmer than Barren Yellow. They are different kinds of paint.
The same difference applies the other way round: Barren Yellow is a little lighter, 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.
See Barren Yellow on the colour wheel See Inktense Ochre on the colour wheel
All matches: Barren Yellow equivalents · Inktense Ochre equivalents