ΔE 9.4, close: similar, with a visible difference side by side. Screaming Sun is a little lighter, more muted than Sunpetal.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Screaming Sun is a little lighter, more muted than Sunpetal.
The same difference applies the other way round: Sunpetal is a little darker, 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 Screaming Sun on the colour wheel
All matches: Sunpetal equivalents · Screaming Sun equivalents