B♭ Dominant 9th :: B♭ D F A♭ C

B
F♯
D
A
3
9
B♭
♭7
3
5
9
B♭
3
5
9
♭7
3
B♭
5
♭7
9
B♭
5
♭7
⬤ ⬤
3
⬤ ⬤
B Sus 4th :: B E F♯

B
F♯
D
A
B
5
4
B
5
4
B
5
4
B
5
4
⬤ ⬤
B
5
⬤ ⬤