I read that antimatter and matter are identical aside from their opposite charge and quantum number. Of course, the mystery of why matter dominates in our universe is an active field of research. But from a purely physical standpoint, if our universe happened to be dominated by antimatter, would we even be aware?
Are there any physical limitations of antimatter vs matter in which certain processes we observe would not work in an antimatter universe?
I gather, if all matter in the universe were able to simultaneously change into their antimatter counterpart, that there would still just exist the same balance we observe in our regular universe since everything flips together.
But I also read an interesting point that neutrinos (which don't have charge) have antimatter twins which have opposite helicity (spin) direction, which may affect decay rate. Still though, would this even make a difference to what we observe in our everyday lives? Domination of matter aside, is there anything that restricts a universe comprised of antimatter?