ΔE 6.4, close: similar, with a visible difference side by side. Black (Metallic) is a little lighter than Silver Leaf.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Black (Metallic) is a little lighter than Silver Leaf.
The same difference applies the other way round: Silver Leaf 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 Silver Leaf on the colour wheel See Black (Metallic) on the colour wheel
All matches: Silver Leaf equivalents · Black (Metallic) equivalents