ΔE 28.0, loose: different enough that you should pick on purpose. Light Gull Gray is a little darker, much more muted than Pink Potion.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Light Gull Gray is a little darker, much more muted than Pink Potion.
The same difference applies the other way round: Pink Potion is a little lighter, 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 Pink Potion on the colour wheel See Light Gull Gray on the colour wheel
All matches: Pink Potion equivalents · Light Gull Gray equivalents