The RCC greatly increased in number post-schism. This is largely due to the colonization efforts of Portugal, Spain, France, England, and other Western European Nations. Also, Western Europe did not suffer under the Mongols and the Ottoman empire as Eastern Europe did.
As far as Bishops, at the time of the schism (and to present day), the East had the Patriarchates of Constantinople, Alexandria, Jerusalem, and Antioch. (Moscow was added later.) The West simply had Rome. How many ArchBishops and such I am unsure.
Hope this helps,