There was a huge difference between the behavior of Zeus and Jesus’ teachings. Zeus did what ever he wanted to do without ethical restrictions. Jesus came partially because He needed to show humans the ethical way to live.
Some good examples of how unethical Zeus was were when he would go to earth and rape women because he wanted to. He would then lie to his wife that way he didn’t take lip. Jesus taught us to respect others and respect their opinions. Raping someone is not a form of showing respect. Jesus also advocated against using force on other people.
Another example of a difference between Jesus and Zeus was that Jesus taught us to love our neighbors as ourselves. Jesus was very kind and healed many, some of them were underserving. Jesus showed us that we are all undeserving of His healing and forgiveness. Jesus still died for all of us and healed many people anyways. We do not see this type of behavior coming from Zeus. In most of the stories we see that Zeus was trying to please himself. I think that Zeus was primarily portrayed as a hedonist. He only cared about himself and pleasing himself. In the Greek stories Zeus never went out of his way to help other gods or humans. In most cases it seemed that Zeus would frequently act cruel and sharp towards others if it meant he would get what he wanted. Zeus would not go out of his way to be a butt hole, but in all the accounts I have read about him I never heard of him going out of his way to help others. On the other hand Jesus died for all of us and we were all undeserving of His sacrifice. Zeus thought he was superior to everyone else so he never considered going out of his way to help people weaker than him.
Another large difference we see is that Jesus was meant to set a good example on how we should treat others in life while Zeus was a terrible person to act like. You know that Zeus was a bad god when it was likely that more than half of the population made more ethical decisions than Zeus did. Most people would think that a god should be perfect like Jesus rather than a powerful hedonist like Zeus.
Basically we see that Zeus had not ethical limitations on himself and that Jesus taught us to be humble and serve others. We see that Zeus was less ethical than most men and Jesus was perfect and free of sin. Zeus was selfish and a hedonist and Jesus taught us to serve others and control our desires that could lead to bad consequences.