I played around with PSVR at a friend's house first. I thought it was okay, but nothing mind blowing. Nothing that I felt any "must have" urge to purchase for myself, or even rush back to my friend's house for more. I wasn't completely fascinated with VR until I got the Oculus Rift a couple of months later. My wife and I were instantly wowed just by the introductory tech demo "First Contact" and have been by several other VR games since (VR Sports Challenge, Everest VR, Wilson's Heart, Robo Recall, etc). I brought over the same friend and his wife who showed me their PSVR, and they were amazed as well. I've heard people say that the difference between the two isn't a big deal, but I disagree. My friend's wife, while playing the Rift even exclaimed that the difference was "night and day". While playing "Wilson's Heart", she literally jumped and reacted to several of the jump scares, which my friend says she never does with any other medium. Since they own a PS4 and spent a lot more time with PSVR than I did, I considered that a very good testimonial. It was also very satisfying to see my uncle, who is not a video game guy, get completely immersed in it when he came over for a visit.
I played Vive and PSVR.
I didn't notice the graphics difference between both.