IDK, in business, something ethically wrong is clearly defined somewhere as bad practice, but not illegal.
Morraly wrong is something that the society will see as bad.
Therefore stuff that is moral is normally ethical.
but stuff that is ethical, may or may not be moral.
Moral(and ethical): Save the girl by persuading her to spend the night with you (in seperate beds)
Ethical(but moraly wrong): Save the girl by drugging her, but not sleeping with her once you get home.