Thanks to Sir Pendragon fir this info:
http://www.gameblog.fr/news/61517-gamescom-final-fantasy-xv-ps4-vs-xbox-one-oui-il-y-aura-une-
- He says he would have been ashamed if everyone couldn't enjoy what the day 1 patch was going to offer ( he is talking about those unable to download it ) .
- He says the ps4 is more powerful than the X1, a difference between both versions is inevitable .
- But now with DX12 they can optimise the X1 version better than before .
- Whether it is the X1 or the ps4 he wants us to know that the available demos aren't fully optimised (in term of rendering ) . They didn't hit the top quality yet , but with 2 months left he is hopeful/hoping they can hit a superior level of graphics than the current one .