ΔE 22.4, loose: different enough that you should pick on purpose. Light Metallic Blue is much more saturated than Enchanted Steel.
Can I use Light Metallic Blue instead of Enchanted Steel?
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Light Metallic Blue is much more saturated than Enchanted Steel.
Can I use Enchanted Steel instead of Light Metallic Blue?
The same difference applies the other way round: Enchanted Steel is much more muted.
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.