Just watched this on my phone, not ideal, but from what I can tell PRO's effects composition looks different. Yet there could be other reasons......PRO's image and colors looks to be less saturated than the rest, especially against XBONEX and vanilla PS4.
It would seem PRO is using CB4K/1620p.....XBONEX is native 4K, vanilla PS4 is 1080p and XBONES is below 1080p obviously.......
Yet, once again shout-outs to Ubi, the best multiplat developer this gen, they had their issues early on and they are on record saying they forced parity, but at least we know they're far removed from that and have given each hardware love commensurate with their capabilities for quite a few titles, and have esteemed framerate above all else too. In truth, you don't play resolution, you play frames....
Still, seeing the game running so smooth, even on XBONES, suggests that perhaps 1080p 60 could be a possibility on consoles, so that would be a neat feature to offer as an option tbh........