ΔE 14.0, fair: the same colour family, but not a straight swap. Seven Pillars of Wisdom is noticeably lighter than Topaz Skin.
Can I use Seven Pillars of Wisdom instead of Topaz Skin?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Seven Pillars of Wisdom is noticeably lighter than Topaz Skin.
Can I use Topaz Skin instead of Seven Pillars of Wisdom?
The same difference applies the other way round: Topaz Skin is noticeably darker.
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.