ΔE 20.4, loose: different enough that you should pick on purpose. Metallic Blue is noticeably darker, much more saturated than Enchanted Steel.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Metallic Blue is noticeably darker, much more saturated than Enchanted Steel.
The same difference applies the other way round: Enchanted Steel is noticeably lighter, 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.
See Enchanted Steel on the colour wheel See Metallic Blue on the colour wheel
All matches: Enchanted Steel equivalents · Metallic Blue equivalents