What makes it different from others?

Very well executed

brilliant actors, brilliant editing

Worth seeing just to witness how winsome it is.

An insurance investigator (Philippe Leroy) tailing an enigmatic young woman involved in a possible insurance scam seduces her to get information but the hunter soon gets captured by the game in Luigi Comencini's somber yet romantic variation on the film noir classic ANGEL FACE, greatly enhanced by a moody Ennio Morricone score.Although it's not mentioned in Adrian Luther Smith's "giallo bible" BLOOD & BLACK LACE: THE DEFINITIVE GUIDE TO Italian SEX AND HORROR MOVIES, the film wouldn't have been out of place there since it's reely no different than the ones Umberto Lenzi liked to crank out in the late '60s with Carroll Baker. These psychological (or "bloodless") gialli usually revolved around an inheritance scheme with heirs resorting to homicide and it's a major plot point here as well but despite the murder and suicide involved, the body count remains low until the shocking conclusion (which you might see coming if you're familiar with Simmons & Mitchum's end in the American film noir that obviously inspired it). Pretty good.