ΔE 24.9, loose: different enough that you should pick on purpose. Carroburg Crimson is noticeably lighter, much more saturated, cooler than Dark Red Tone.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Carroburg Crimson is noticeably lighter, much more saturated, cooler than Dark Red Tone.
The same difference applies the other way round: Dark Red Tone is noticeably darker, much more muted, 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 Red Tone on the colour wheel See Carroburg Crimson on the colour wheel
All matches: Dark Red Tone equivalents · Carroburg Crimson equivalents