ΔE 14.3, fair: the same colour family, but not a straight swap. T'au Light Ochre is a little lighter, more muted, warmer than Bubonic Ochre.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). T'au Light Ochre is a little lighter, more muted, warmer than Bubonic Ochre.
The same difference applies the other way round: Bubonic Ochre is a little darker, more saturated, 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 Bubonic Ochre on the colour wheel See T'au Light Ochre on the colour wheel
All matches: Bubonic Ochre equivalents · T'au Light Ochre equivalents