ΔE 16.8, loose: different enough that you should pick on purpose. Trollslayer Orange is a little lighter, much more saturated than Warm Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Trollslayer Orange is a little lighter, much more saturated than Warm Orange.
The same difference applies the other way round: Warm Orange is a little darker, much more muted.
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 Warm Orange on the colour wheel See Trollslayer Orange on the colour wheel
All matches: Warm Orange equivalents · Trollslayer Orange equivalents