Im not sure which Roku version this girl i was talking to had, but when I came over the UI was 2nd rate.status & the one on my Sony smart TV is trash.
PS4 Netflix isn't much different than PS3 version...just okay. I actually prefer XB1 for Netflix out of all of them
I ended up copping a roku 3 and after a day it wouldn't play with my surround sound (I have a little older 3.1 one) so I went and traded it in for an amazon fire and have been eating ever since....It has the same resoluition as the PS4 Netflix and other channels...
I orignally had an Older Roku and can tell that the UI changes based on the streaming box you have.
So all in all Yes PS4 does have the best Netflix expierenct due to Netfix Max which I haven't seen anyone.