ΔE 6.2, close: similar, with a visible difference side by side. Bony Matter is more muted, cooler than Uniform Sand Yellow FS-32555. They are different kinds of paint: AMMO by Mig Uniform Sand Yellow FS-32555 is an opaque base/layer paint and Army Painter Bony Matter is a one-coat contrast-style 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). Bony Matter is more muted, cooler than Uniform Sand Yellow FS-32555. They are different kinds of paint.
The same difference applies the other way round: Uniform Sand Yellow FS-32555 is more saturated, 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 Uniform Sand Yellow FS-32555 on the colour wheel See Bony Matter on the colour wheel
All matches: Uniform Sand Yellow FS-32555 equivalents · Bony Matter equivalents