ΔE 6.7, close: similar, with a visible difference side by side. USA Flat Brown is a little lighter than Linoleum Deck Brown.
Can I use USA Flat Brown instead of Linoleum Deck Brown?
Usually, if you are not matching paint already on the model. Close match (ΔE 7). USA Flat Brown is a little lighter than Linoleum Deck Brown.
Can I use Linoleum Deck Brown instead of USA Flat Brown?
The same difference applies the other way round: Linoleum Deck Brown is a little darker.
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.