ΔE 25.0, loose: different enough that you should pick on purpose. Gloss Aluminum is noticeably lighter, more muted than Ironbreaker.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Gloss Aluminum is noticeably lighter, more muted than Ironbreaker.
The same difference applies the other way round: Ironbreaker 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 Ironbreaker on the colour wheel See Gloss Aluminum on the colour wheel
All matches: Ironbreaker equivalents · Gloss Aluminum equivalents