B Diminished :: B D F

F
C
G
D
♭5
♭3
♭3
♭5
B
♭5
B
♭3
♭3
B
♭5
B
⬤ ⬤
♭5
♭3
⬤ ⬤
D♭ Minor 6th :: D♭ F♭ A♭ B♭

F
C
G
D
D♭
5
♭3
5
6
♭3
6
D♭
5
D♭
5
6
♭3
6
♭3
D♭
⬤ ⬤
⬤ ⬤