I thought this was always expected? With Sony most likely splashing some cash towards them most likely to get the games attention on PS4. Don't they have some kind of DLC deal with Ubisoft as well?
Xbox One version was always going to be a little worse, but I highly doubt it will be a disaster, it will be close to the PS4 version, but probably not as optimised in some areas. But really is that a big deal? As long as its not the current generation version, which the Wii U one looks like it is, then whats the big deal if it dips down a few fps sometimes?