The one's that controls the drug market will be the victors.

Toronto : Commisso, Figliomeni (Keep in mind there are other Italian mafia clans in Ontario).

Montreal : Rizzuto, Mirarchi In Montreal there is no overall boss at the moment. All there is, are shot gun marriages between different clans. Mirarchi name was purely based on his connections to the Ndrangheta and HA.

In my opinion, the days of a supreme boss are over. Today there are too many criminal organizations. Media sources have reported the Ndrangheta being most powerful at the moment. The reason for this success is their "Modus Operandi"; which is to reach other criminal organizations worldwide in order to form new alliances. In some cases or areas they do "colonize" the markets.
The word colonize is used by Italian prosecutors to explain how they managed to control criminal activities in certain parts of Italy or other countries. They initially do not walk in a certain territory and say their now in charge and start warring. They will work with whomever is in charge and not seek total control but they will defend themselves once they are established. This has made them wealthy and powerful.