From my understanding, utopia is an ideal city that perfect in everything so people can live there happily. In the contrast way dystopia is represent of like totalitarian governments, poverty, pollution and fear.
After watching The Hunger games I think the movie can show very well in difference of Utopia and Dystopia city. The Capitol, the capital of Panem acted as a Utopian society since the seat of power is here. Citizen of the Capitol is extremely wealthy and unconcerned with the poverty of surrounded twelve districts that ruled absolutely by the Capitol, They just enjoying a mass entertainment like the Hunger Games. The twelve districts is acted like a resource that export their products to serve the Capitol, so it made many districts face with the poverty issue and not enough food to feed their citizen. For me the twelve districts are like a Dystopia society because they are under controlled of the Capitol strictly. In the movie you can clearly see the huge difference city between District 12 and the Capitol through Katniss journey and we can see also the relationship between these two societies that the Capitol citizen thinks that they’re higher than the districts people by set the rule of The Hunger Games that the citizen of Capitol can not be a tributes of this game, only the twelve districts can. So they think they can play with the tributes lives and enjoying this crazy game every year without any feeling to against it. In the end of the movie I think Panem is a dystopia even though the capital city is a utopia but the kingdom is separated in 2 classes of people and its not balancing, people hate each other, they don’t care to others lives. In the future it must be something happen because of this too different society, the district people maybe fight against the Capitol because of their sons and daughters must died every year because of this crazy game or some of the district are run out of resources?
Lastly I think Utopia and Dystopia is depends on human perception, maybe the district life is already a utopia for them rather than stay in the Capitol.