ΔE 4.2, very close: most people won’t see a difference side by side. Steel (Metallic) is a little darker than Pearl White. They are different kinds of paint: Tamiya Pearl White is a pearl paint and Vallejo Steel (Metallic) is a metallic, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 4). Steel (Metallic) is a little darker than Pearl White. They are different kinds of paint.
The same difference applies the other way round: Pearl White 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 Pearl White on the colour wheel See Steel (Metallic) on the colour wheel
All matches: Pearl White equivalents · Steel (Metallic) equivalents