Polished Silver vs Silver Fox

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Silver Fox is a little darker than Polished Silver.

Can I use Silver Fox instead of Polished Silver?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Silver Fox is a little darker than Polished Silver.

Can I use Polished Silver instead of Silver Fox?

The same difference applies the other way round: Polished Silver is a little lighter.

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.