Wow, thanks for the reply !
I visited the Stag first during my first playthrough so I didn't encounter Dimitri, Paul and Felipe and it even changed Harlan's dialogue (if you choose to go to the Stag and then the City Hall, he didn't give you that much info)
Definitively feels like a better pick of choices that mines in my first playthrough, everything that brings William and Samuel closer is needed
William's talk during the NSFW scene was quite painful, he really seems to suffer about his situation and what he is