Golden Armour vs Dragon's Gold

How close are they?

ΔE 33.1, loose: different enough that you should pick on purpose. Dragon's Gold is noticeably lighter, cooler than Golden Armour.

Can I use Dragon's Gold instead of Golden Armour?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 33). Dragon's Gold is noticeably lighter, cooler than Golden Armour.

Can I use Golden Armour instead of Dragon's Gold?

The same difference applies the other way round: Golden Armour is noticeably darker, 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.