get the current user ID, different with drupal7 ?

I need to get the current user ID in the view :

In drupal7 view, I will select the contexttual filter for : Profile:User uid/User ID from url
But in Drupal 8, I don't see there is a "User ID from url" there is only a "User ID from logged user "

I guess they are not the same ?? can anyone tell they are the same thing and working in the same way ? Thank you.