How are the 3 parables different? The Parable of Good Samaritan
A Parable from Jesus

Luke 10:30-37 Jesus answered, "A certain man was going down from Jerusalem to Jericho, and he fell among robbers, who both stripped him and beat him, and departed, leaving him half dead. By chance a certain priest was going down that way. When he saw him, he passed by on the other side. In the same way a Levite also, when he came to the place, and saw him, passed by on the other side. But a certain Samaritan, as he traveled, came where he was. When he saw him, he was moved with compassion, came to him, and bound up his wounds, pouring on oil and wine. He set him on his own animal, and brought him to an inn, and took care of him. On the next day, when he departed, he took out two denarii, and gave them to the host, and said to him, ‘Take care of him. Whatever you spend beyond that, I will repay you when I return.’ Now which of these three do you think seemed to be a neighbor to him who fell among the robbers?" He said, "He who showed mercy on him." Then Jesus said to him, "Go and do likewise."

A Hindu Parable

Lord Krishna wanted to test the wisdom of his kings. One day he summoned a king called Duryodana. Duryodana was well known throughout the land for his cruelty and miserliness, and his subjects lived in terror.
Lord Krishna said to King Duryodana, "I want you to go and travel the world over and find for me one truly good man."
Duryodana replied, "Yes, Lord," and obediently began his search.
He met and spoke with many people, and after much time had passed he returned to Lord Krishna saying, "Lord, I have done as you have asked and searched the world over for one truly good man. He is not to be found. All of them are selfish and wicked. Nowhere is there to be found this good man you seek!"
Lord Krishna sent him away and called another king called Dhammaraja. He was a king well known for his generosity and benevolence and well loved by all his people.
Krishna said to him, "King Dhammaraja, I wish for you to travel the world over and bring to me one truly wicked man." Dhammaraja also obeyed, and on his travels met and spoke with many people.
After much time had passed he returned to Krishna saying, "Lord, I have failed you. There are people who are misguided, people who are misled, people who act in blindness but nowhere could I find one truly evil man. They are all good at heart despite their failings.

The Hungry Dog
A Buddhist Parable

There was a great king who oppressed his people and was hated by his subjects; yet when the Tathagata came into his kingdom, the king desired much to see him. So he went to the place where the Blessed One stayed and asked: "O Sakyamuni, canst thou teach a lesson to the king that will divert his mind and benefit him at the same time?"
And the Blessed One said: "I shall tell thee the parable of the hungry dog:
There was a wicked tyrant; and the god Indra, assuming the shape of a hunter, came down upon earth with the demon Matali, the latter appearing as a dog of enormous size. Hunter and dog entered the palace, and the dog howled so woefully that the royal buildings shook by the sound to their very foundations. The tyrant had the awe-inspiring hunter brought before his throne and inquired after the cause of the terrible bark. The hunter said, "The dog is hungry," whereupon the frightened king ordered food for him. All the food prepared at the royal banquet disappeared rapidly in the dog's jaws, and still he howled with portentous significance. More food was sent for, and all the royal store-houses were emptied, but in vain. Then the tyrant grew desperate and asked: 'Will nothing satisfy the cravings of that woeful beast?' "Nothing," replied the hunter, nothing except perhaps the flesh of all his enemies.' 'And who are his enemies?' anxiously asked the tyrant. The hunter replied: 'The dog will howl as long as there are people hungry in the kingdom, and his enemies are those who practice injustice and oppress the poor." The oppressor of the people, remembering his evil deeds, was seized with remorse, and for the first time in his life he began to listen to the teachings of righteousness."
Having ended his story, the Blessed One addressed the king, who had turned pale, and said to him:
"The Tathagata can quicken the spiritual ears of the powerful, and when thou, great king, hearest the dog bark, think of the teachings of the Buddha, and thou mayest still learn to pacify the monster."