I suspect mine is closer than many. This world, to my knowledge, does not have magic beyond the portal and what it brings here. Mine does have magic, but it is quiet, known only to a few, not believed in by most. In that way, it is more similar to this one than even some others that have a United States of America. But I do not know that it would be the one directly closest to it.
Another issue to consider, even were you able to travel from world to world to world etc to your own is that you have also traveled in time to be here. Most of us have to some extent. A few years in my case.