In my opinion, Harry, whom appears carefree and fun, is truly troubled. He acts up in public places after abusing substances such as alcohol and marijuana. Vino Veritas (is latin)for, wine tells the truth.
He looses control and shows his inner termoil. He has plenty of demons to fight, especially with having to accept all the ugly circumstances surrounding his mother's death and his fathers re-marriage to a women, that not only ruined his mother's marriage and happiness, but is forced to pretend he likes her, according to Harry. (William has never said this, neither does he ever mention her) Harry has said he "love's her to bits". I for one, will never believe him. Harry isn't more fun, but much more confused. His personality is such that he is easly manipulated by his father to say and do whatever Prince Charles wishes. William, on the other hand, knowing and remembering so much more about his mothers suffering, would have a difficult time lying so easly to the British public. He keeps it all inside. After all, he will be King. Harry, aka "the spare" regardless of all the brain washing from Prince Charles, that has taken place since 1997, knows something is very disturbing about a woman his mother despised so much becoming his stepmother. I feel for them both. Born so priviledged, and yet trapped into this horrible nightmare.