I mean in the amount of energy it has and in its size. That which is observable is apparently only a sub-universe. It seems to be limited only by physical laws, but even those laws could be different in other sub-universes.
I don't know about any differences. Particle physicists don't have much of an opinion on gravity and on uniting gravity with the other forces.
A proton and neutron can still have three quarks each with some of them being matter quarks and others being antimatter quarks. The strong and weak forces can be manifestations of gravity and electromagnetism at short scales, and electromagnetism could be a manifestation of gravity and anti-gravity, but particle physicists generally do not concern themselves with such ideas.
I doubt if the laws are different, but very likely our known laws would have to be expanded to explain the differences in phenomena.
Okay, I re-read that comment and I see where I may have misunderstood you.
These different laws are supposedly different ways of cooling from extreme conditions of energy density. My theory doesn't have anything to say about that, I brought it up because it's another theory out there that makes the observable universe (sub-universe) a smaller part of the absolute universe.