ΔE 28.8, loose: different enough that you should pick on purpose. Gunmetal (Metal.) is noticeably lighter, much more muted than Taro.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Gunmetal (Metal.) is noticeably lighter, much more muted than Taro.
The same difference applies the other way round: Taro 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 Taro on the colour wheel See Gunmetal (Metal.) on the colour wheel
All matches: Taro equivalents · Gunmetal (Metal.) equivalents