Oh, and unreal is totally free. You get all features right

Question

Oh, and unreal is totally free. You get all features right

away, you only pay if you wanna sell the game.
You will have to share 5% of the games income. Make money -> 5%, make no money 5%. What's 5% of nothing? Nothing! It's free.

Unity on the other hand will charge you money if you have a certain amount of income, so if you just wanna try unity or make FREE unity games while earning the income that requires you to pay, you have to pay.

And that is the biggest downside to Unity.
Oh and it requires you to pay for their visual scripting language, where as unreal has it out of the box.