ΔE 13.2, fair: the same colour family, but not a straight swap. Clear Yellow is a little lighter, more saturated, cooler than Sunpetal. They are different kinds of paint: Army Painter Sunpetal is an opaque base/layer paint and Reaper Clear Yellow 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 13). Clear Yellow is a little lighter, more saturated, cooler than Sunpetal. They are different kinds of paint.
The same difference applies the other way round: Sunpetal is a little darker, more muted, 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 Sunpetal on the colour wheel See Clear Yellow on the colour wheel
All matches: Sunpetal equivalents · Clear Yellow equivalents