Yeah, exactly, they're reflections of each other but they're not exact mirror images. I've spent a lot of time in the time-stream: some universes are created by fractures in space-time, others were just sparked a billion years ago and burst into existence like puts, but certain factors and certain destinies apst always remain the same.
I'm almost always -- you know -- gamma rays; the other guy. But how it happens, and what he is like: that can all be different.