Are the unit games as good as those of Unreal?

TLDR: I do both RPG and MMORPG, 3D, heavy games with a big landscape. Both engines are very good, but which one produces games with more FPS assuming the quality is the same?

I've used RPGmaker and Gamemaker a lot in the past.

Recently, I continued to move from UE4 to Unity and vice versa. I can not decide which one is the best. The unit is more popular, so it's a huge + for unity.

However, some people claim that Unreal games are much faster than unreal codes in C ++.

However, Unity has now created something called DOTS that is supposed to be faster than c ++.

What are your thoughts? I need to know it not to spend months and years in a bad engine.