Originally Posted by
Digifiend
MC2's divergence point is 1998, the year it started publication. For example, Jolt is still around instead of going to Counter-Earth, Anya Corazon (who appeared late in the run) is still Arana and not Spider-Girl and maintained her original status quo, and Jubilee never lost her mutant powers. Cassie Lang was never Stature either, and was older when she became Stinger.
RYV's divergence point is at some point prior to One More Day, which never happened. However, for the X-Men, it seems everything from 2000 or so (the point when they changed their uniforms) happened differently.