ΔE 5.9, very close: most people won’t see a difference side by side. Dark Slate Grey is a little lighter, cooler than Dark Boot Brown.
Yes, for most jobs. Very close match (ΔE 6). Dark Slate Grey is a little lighter, cooler than Dark Boot Brown.
The same difference applies the other way round: Dark Boot Brown is a little darker, warmer.
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 Dark Boot Brown on the colour wheel See Dark Slate Grey on the colour wheel
All matches: Dark Boot Brown equivalents · Dark Slate Grey equivalents