Screaming Bell vs Gold 79

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Gold 79 is noticeably darker, more muted than Screaming Bell.

Can I use Gold 79 instead of Screaming Bell?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Gold 79 is noticeably darker, more muted than Screaming Bell.

Can I use Screaming Bell instead of Gold 79?

The same difference applies the other way round: Screaming Bell is noticeably lighter, 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.