ΔE 9.0, close: similar, with a visible difference side by side. Perylene Violet is a little lighter, more muted, warmer than Screamer Pink.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Perylene Violet is a little lighter, more muted, warmer than Screamer Pink.
The same difference applies the other way round: Screamer Pink 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 Screamer Pink on the colour wheel See Perylene Violet on the colour wheel
All matches: Screamer Pink equivalents · Perylene Violet equivalents