Less screen door effect on the PSVR (in the event you can't look past it or whatever, I know some people have issues) and the PSVR has a much better fit and feel on your head. I wish I played more than just Eve, it's an example of the biggest problem w/ the gen 1 HMDs and that's resolution. Just felt like it got kinda muddy. Will have to go back and try some of the more stylized 'made for PSVR' games since, Eve could have suffered from being ported to PS4 too, I hadn't played it at all before and by apples-to-oranges comparison thought Elite: Dangerous looked great on my Vive.
Considering the bundled hardware and software, twice the price isn't really accurate, unless you're already invested in move controllers and the PS4 eye.