ΔE 13.7, fair: the same colour family, but not a straight swap. Gold 79 is noticeably darker than Sycorax Bronze.
Can I use Gold 79 instead of Sycorax Bronze?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Gold 79 is noticeably darker than Sycorax Bronze.
Can I use Sycorax Bronze instead of Gold 79?
The same difference applies the other way round: Sycorax Bronze 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.