I think some are making the point that you already chose your console based on friends, so it has no basis since you are going to choose the game to play with your friends, regardless of performance. Like last gen with PS3 inferior ports.
My question is, who are these "friends" people have? And why do their friends always decide the system for them? Is there like a friend voting council where every generation they choose the console to buy? Or is nobody a leader of the pack?
But friends doesnt decide anything to no one! I dont think you cant understand the situation, honestly.
If you have both consoles, XB1 and PS4, and for whatever reason most of your friends only have an XB1, and they are the ones who you usually play online with, why the hell would you buy that game for PS4 if, at the end of the day, theyre both totally solid and similar?? Why would you sacrifice the social aspect of the game, being able to play with your friends, to play with some random people without the same communication just for minor performance or visuals differences? That would be a totally unreasonable thing to do.
Seriously... Thats not hard to understand. Not at all!
If we were talking about a totally different situation where the XB1 version had serious performance issues and / or much worse visuals, than I could understand why you should get the PS4 version even if most of friends you play with only have an XB1. Thats not the case though.
Its not like people carry a "checklist of excuses" as sadly some people seems to believe. For some people, controller, user interface, functionality and available friends are subjective points wich people could clearly prefer over minor technical differences between both versions of the same title.
And by the way, for these people Digital Foundry or any other technical analysis can still be totally relevant, so you could analyse how much worse one version is against another before deciding between those subjective points I stated. Or even just to decide if he should buy the game at all or not.