That doesn't make any sense. If a PS4 game runs at 1080/60, and so does the Xbox one, how is the PS4 version "gimped"? Are there any examples of Ps4 games achieving higher than 1080/60?
You know that resolution is not the only factor when it comes to parity ? There is no issue with both running at 1080p/60fps as long as there is a significant gap in terms of graphics. If there is none then you don't need me to tell you the PS4 could render more, therefore it's gimped.
If two multiplats are identical it's a sign that one has been held back for various reasons.