Which is better Unity or Unreal Engine

I would say it really depends on the type of game you want to make. I don't think you can just say one is better than the other at everything, though if you're looking to make AAA-esque games, Unreal is definitely the way to go. However, if you're a beginner, Unity may be easier to get a handle on. Unity is also better for making mobile games and simulation games, for the most part. But any sort of action-driven game with large environments and heavy graphical demands is definitely where Unreal stands out.