Contrasting two things:
* Unlike the other students, she finished the assignment early.
* Unlike traditional cars, electric vehicles are very quiet.
* Unlike my brother, who loves spicy food, I prefer bland dishes.
Emphasizing a difference:
* Unlike the rumors you've heard, I am not leaving the company.
* Unlike the old model, the new one is much more user-friendly.
* Unlike other predators, dolphins are known for their intelligence.
Introducing an exception:
* Unlike most of his friends, he prefers to stay home on weekends.
* Unlike the other candidates, she has a proven track record.
* Unlike the rest of the team, he was not able to meet the deadline.
As a preposition:
* The cat sat on the table, unlike the dog, who preferred the floor.
* He was dressed in a suit, unlike his friends, who wore casual clothes.
These are just a few examples. The usage of "unlike" depends on the context and what you want to emphasize.