Bright Neutral Grey vs Sunrise Blue

How close are they?

ΔE 23.9, loose: different enough that you should pick on purpose. Sunrise Blue is a little lighter, much more saturated than Bright Neutral Grey.

Can I use Sunrise Blue instead of Bright Neutral Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Sunrise Blue is a little lighter, much more saturated than Bright Neutral Grey.

Can I use Bright Neutral Grey instead of Sunrise Blue?

The same difference applies the other way round: Bright Neutral Grey is a little darker, much more muted.

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.