ΔE 27.2, loose: different enough that you should pick on purpose. Speed Metal is noticeably lighter, much more muted than Azure Magic.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Speed Metal is noticeably lighter, much more muted than Azure Magic.
The same difference applies the other way round: Azure Magic is noticeably darker, much 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 Azure Magic on the colour wheel See Speed Metal on the colour wheel
All matches: Azure Magic equivalents · Speed Metal equivalents