ΔE 8.7, close: similar, with a visible difference side by side. Bright Brass (Met.) is more muted than Platinum Crown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bright Brass (Met.) is more muted than Platinum Crown.
The same difference applies the other way round: Platinum Crown is 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 Platinum Crown on the colour wheel See Bright Brass (Met.) on the colour wheel
All matches: Platinum Crown equivalents · Bright Brass (Met.) equivalents