ΔE 15.9, loose: different enough that you should pick on purpose. Peach Skin is more muted, warmer than Imp Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Peach Skin is more muted, warmer than Imp Yellow.
The same difference applies the other way round: Imp Yellow is more saturated, cooler.
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 Imp Yellow on the colour wheel See Peach Skin on the colour wheel
All matches: Imp Yellow equivalents · Peach Skin equivalents