ΔE 15.2, loose: different enough that you should pick on purpose. Off-White is a little darker, more muted, warmer than Cremeweiss RAL 9001.
✓ AMMO ATOM user guide chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Off-White is a little darker, more muted, warmer than Cremeweiss RAL 9001.
The same difference applies the other way round: Cremeweiss RAL 9001 is a little lighter, 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 Cremeweiss RAL 9001 on the colour wheel See Off-White on the colour wheel
All matches: Cremeweiss RAL 9001 equivalents · Off-White equivalents