ΔE 13.1, fair: the same colour family, but not a straight swap. Porcelain Rose is a little darker, cooler than Tourmaline Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Porcelain Rose is a little darker, cooler than Tourmaline Skin.
The same difference applies the other way round: Tourmaline Skin is a little lighter, warmer.
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 Tourmaline Skin on the colour wheel See Porcelain Rose on the colour wheel
All matches: Tourmaline Skin equivalents · Porcelain Rose equivalents