ΔE 15.9, loose: different enough that you should pick on purpose. JMSDF 2704 Gray N5 is a little darker, much more muted than Slaanesh Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). JMSDF 2704 Gray N5 is a little darker, much more muted than Slaanesh Grey.
The same difference applies the other way round: Slaanesh Grey is a little lighter, much more saturated.
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 Slaanesh Grey on the colour wheel See JMSDF 2704 Gray N5 on the colour wheel
All matches: Slaanesh Grey equivalents · JMSDF 2704 Gray N5 equivalents