WWE 2K Differences Between 7th Gen and 8th Gen

[King Patrick Star]

I just got my hands on WWE 2K15 yesterday for the PS4. I’ve had it for the XBOX 360, but because I’m a selective completist, I decided to pick up a new copy for $15. Anyway, the first thing I noticed, while customizing my settings it that there are some Championship Title Belts that are in the XBOX 360 version, but are not in the PS4 version, like the AWA World Championship Title Belt, a few Tag Team Championship Title Belts, as well as a few others. Then I noticed that an older version of William Regal is in the PS4, but not in the XBOX 360. I’ll check out WWE 2K16 later on tonight to see if that has any differences.

So my questions are:
What are the other WWE 2K Games differences between the 7th Generation consoles and the 8th Generation consoles??
What are the other WWE 2K Games differences between the XBOX consoles and the Play Station consoles??