ΔE 14.9, fair: the same colour family, but not a straight swap. Golden Griffon is noticeably darker than Moon Dust.
Can I use Golden Griffon instead of Moon Dust?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Golden Griffon is noticeably darker than Moon Dust.
Can I use Moon Dust instead of Golden Griffon?
The same difference applies the other way round: Moon Dust is noticeably lighter.
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.