ΔE 18.3, loose: different enough that you should pick on purpose. Deathclaw Brown is noticeably darker, warmer than Count of Tuscany.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Deathclaw Brown is noticeably darker, warmer than Count of Tuscany.
The same difference applies the other way round: Count of Tuscany is noticeably lighter, 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.
See Count of Tuscany on the colour wheel See Deathclaw Brown on the colour wheel
All matches: Count of Tuscany equivalents · Deathclaw Brown equivalents