ΔE 6.9, close: similar, with a visible difference side by side. Yellow Oxide is cooler than T'au Light Ochre. They are different kinds of paint: Citadel T'au Light Ochre is an opaque base/layer paint and Golden Yellow Oxide 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 7). Yellow Oxide is cooler than T'au Light Ochre. They are different kinds of paint.
The same difference applies the other way round: T'au Light Ochre is warmer.
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 T'au Light Ochre on the colour wheel See Yellow Oxide on the colour wheel
All matches: T'au Light Ochre equivalents · Yellow Oxide equivalents