ΔE 23.3, loose: different enough that you should pick on purpose. Peach Skin is noticeably lighter, much more saturated than Ionrach Skin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Peach Skin is noticeably lighter, much more saturated than Ionrach Skin.
The same difference applies the other way round: Ionrach Skin is noticeably darker, much more muted.
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 Ionrach Skin on the colour wheel See Peach Skin on the colour wheel
All matches: Ionrach Skin equivalents · Peach Skin equivalents