ΔE 10.7, fair: the same colour family, but not a straight swap. Pyrrole Orange is more saturated than Nuclear Sunrise. They are different kinds of paint: Army Painter Nuclear Sunrise is a one-coat contrast-style paint and Golden Pyrrole Orange 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 11). Pyrrole Orange is more saturated than Nuclear Sunrise. They are different kinds of paint.
The same difference applies the other way round: Nuclear Sunrise is more muted.
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 Nuclear Sunrise on the colour wheel See Pyrrole Orange on the colour wheel
All matches: Nuclear Sunrise equivalents · Pyrrole Orange equivalents