ΔE 18.6, loose: different enough that you should pick on purpose. Magnesium is noticeably lighter, more muted than Enchanted Steel.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Magnesium is noticeably lighter, more muted than Enchanted Steel.
The same difference applies the other way round: Enchanted Steel is noticeably darker, 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 Enchanted Steel on the colour wheel See Magnesium on the colour wheel
All matches: Enchanted Steel equivalents · Magnesium equivalents