ΔE 10.1, fair: the same colour family, but not a straight swap. Benzimidazolone Yellow Medium is more muted than Sunpetal. They are different kinds of paint: Army Painter Sunpetal is an opaque base/layer paint and Golden Benzimidazolone Yellow Medium 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). Benzimidazolone Yellow Medium is more muted than Sunpetal. They are different kinds of paint.
The same difference applies the other way round: Sunpetal is more saturated.
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 Sunpetal on the colour wheel See Benzimidazolone Yellow Medium on the colour wheel
All matches: Sunpetal equivalents · Benzimidazolone Yellow Medium equivalents