ΔE 11.5, fair: the same colour family, but not a straight swap. Buff is a little lighter, more muted, warmer than Chromate Yellow Primer FS33481.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Buff is a little lighter, more muted, warmer than Chromate Yellow Primer FS33481.
The same difference applies the other way round: Chromate Yellow Primer FS33481 is a little darker, more saturated, 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 Chromate Yellow Primer FS33481 on the colour wheel See Buff on the colour wheel
All matches: Chromate Yellow Primer FS33481 equivalents · Buff equivalents