ΔE 15.3, loose: different enough that you should pick on purpose. Gengis Khaki is a little lighter, more saturated, cooler than Cypress Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Gengis Khaki is a little lighter, more saturated, cooler than Cypress Brown.
The same difference applies the other way round: Cypress Brown is a little darker, more muted, warmer.
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 Cypress Brown on the colour wheel See Gengis Khaki on the colour wheel
All matches: Cypress Brown equivalents · Gengis Khaki equivalents