ΔE 12.6, fair: the same colour family, but not a straight swap. Deep Yellow is noticeably darker than Radiant Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Deep Yellow is noticeably darker than Radiant Yellow.
The same difference applies the other way round: Radiant Yellow is noticeably 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.
See Radiant Yellow on the colour wheel See Deep Yellow on the colour wheel
All matches: Radiant Yellow equivalents · Deep Yellow equivalents