Is DOOM eternal and ULTRAKILL have the same gameplay?

No hate pls. I have abt 150+h in ultrakill and my friend fucking hate this game. He thinks that this games have the same gameplay and lore. Can you refute his point?

Edited: he also played ULTRAKILL for about 10 minutes, and right now he is saying that ultrakill is like the copy of some famous paintings and not the original. The funny thing is that he didn't even play DOOM.

I want to ultrakill myself