How does the new mirror matter theory differ from other parallel world theories?

We would like to clarify that other partial or seemingly related parallel world proposals in literature are different from the here-discussed mirror matter theory. For example, the twin-Higgs model is just an incomplete mirror model for the Higgs particle only. The brane-world model seems to be an extension to the mirror symmetry but most likely just a mathematical tool lacking physical principles, similar to the relationship between string theory and supersymmetric mirror models. The many world interpretation of quantum mechanics by Everett, the multiverse vision from string theory, and any other parallel world / universe ideas are completely different from the mirror matter theory discussed here.