ΔE 15.9, loose: different enough that you should pick on purpose. Advanced Flesh Tone is a little lighter than Baneblade Brown.
Can I use Advanced Flesh Tone instead of Baneblade Brown?
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Advanced Flesh Tone is a little lighter than Baneblade Brown.
Can I use Baneblade Brown instead of Advanced Flesh Tone?
The same difference applies the other way round: Baneblade Brown is a little 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.