Compare
Harmonic Minor vs Phrygian Dominant
Phrygian dominant is the 5th mode of harmonic minor — same parent scale, different tonic. Spanish vs Eastern European emphasis.
Harmonic Minor
R
♭2
2
♭3
3
4
♭5
5
♭6
6
♭7
7
Phrygian Dominant
R
♭2
2
♭3
3
4
♭5
5
♭6
6
♭7
7
What's different
Only in Harmonic Minor
2♭37
Only in Phrygian Dominant
♭23♭7
In both
R45♭6
Other comparisons