ΔE 6.1, close: similar, with a visible difference side by side. Iridescent Pearl (Coarse) is a little lighter than Shining Silver. They are different kinds of paint: Army Painter Shining Silver is a metallic and Golden Iridescent Pearl (Coarse) is a pearl 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 6). Iridescent Pearl (Coarse) is a little lighter than Shining Silver. They are different kinds of paint.
The same difference applies the other way round: Shining Silver is a little darker.
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 Shining Silver on the colour wheel See Iridescent Pearl (Coarse) on the colour wheel
All matches: Shining Silver equivalents · Iridescent Pearl (Coarse) equivalents