What distinguishes them, and which one is more important for the future of Jewish existence in the years and decades to come?

Today in modern Jewish history, there are two geographic centers of Jewish life, culture, and politics. 
What are they? What distinguishes them, and which one is more important for the future of Jewish existence in the years and decades to come?
It has to be around 1-2 pages long and I also need the references that are used. It also should be APA styled.