Does accusation helps a person change his values or a better ways is to tell a story with moral?

I have a friend say Dev. He always involves himself in flattery of rich people knowingly or unknowingly. Its clearly visible that he shows off in front of rich people or try to gain their friendship in comparison to normal people or people of his status (in terms of wealth). So suppose I directly accuse him by saying that you are a flatterer etc (a person who flatters others because they are rich). This may hurt his feelings. It may possibly hurt feelings of her family as well as my family and may destroy relationships. What are the chances that he is going to accept this as a positive thing and try to bring about a change in him? Another way to tell him is by telling him a story about some rich person who have many flatterers and making fun of those flatterers. In this way I am not directly accusing him and the other person will not get hurt and try to convey a message as well. What are the changes of this kind of conversation impacting him to bring about a positive change in him?