JMSDF 2704 Gray N5 vs USAF Medium Gray

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. USAF Medium Gray is a little lighter, more saturated than JMSDF 2704 Gray N5.

Can I use USAF Medium Gray instead of JMSDF 2704 Gray N5?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). USAF Medium Gray is a little lighter, more saturated than JMSDF 2704 Gray N5.

Can I use JMSDF 2704 Gray N5 instead of USAF Medium Gray?

The same difference applies the other way round: JMSDF 2704 Gray N5 is a little darker, 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.