ΔE 15.2, loose: different enough that you should pick on purpose. Chrome (Metallic) is noticeably lighter than Pale Silver.
Can I use Chrome (Metallic) instead of Pale Silver?
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Chrome (Metallic) is noticeably lighter than Pale Silver.
Can I use Pale Silver instead of Chrome (Metallic)?
The same difference applies the other way round: Pale Silver is noticeably 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.