ΔE 17.9, loose: different enough that you should pick on purpose. Sunset Orange is a little darker, much more saturated, warmer than Pumpkin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Sunset Orange is a little darker, much more saturated, warmer than Pumpkin.
The same difference applies the other way round: Pumpkin is a little lighter, much more muted, 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 Pumpkin on the colour wheel See Sunset Orange on the colour wheel
All matches: Pumpkin equivalents · Sunset Orange equivalents