Count of Tuscany vs Bugman's Glow

How close are they?

ΔE 16.5, loose: different enough that you should pick on purpose. Bugman's Glow is noticeably darker, more muted, warmer than Count of Tuscany.

Can I use Bugman's Glow instead of Count of Tuscany?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Bugman's Glow is noticeably darker, more muted, warmer than Count of Tuscany.

Can I use Count of Tuscany instead of Bugman's Glow?

The same difference applies the other way round: Count of Tuscany is noticeably lighter, more saturated, cooler.

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.