ΔE 8.3, close: similar, with a visible difference side by side. Shadow Red is a little darker than Murder Scene. They are different kinds of paint: Army Painter Murder Scene is a one-coat contrast-style paint and Reaper Shadow Red is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Shadow Red is a little darker than Murder Scene. They are different kinds of paint.
The same difference applies the other way round: Murder Scene is a little lighter.
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 Murder Scene on the colour wheel See Shadow Red on the colour wheel
All matches: Murder Scene equivalents · Shadow Red equivalents