Though these kinds of debates are largely futile, as it's not like tennis rankings or whatever, controlling the lion's share of the European cocaine trade (in addition to their other interests) would make the 'Ndrangheta one of the top OC groups in Europe, if not the top. But one could argue the 'Ndrangheta (and the Italians) in general have more of a presence in Western Europe while the Russians (and other Eurasian OC groups) have more of a presence in Eastern Europe. And the big dogs don't necessarily have to push everyone else aside. For instance, I read an article a while back about how the 'Ndrangheta even allows other ethnic groups to control certain rackets (prostitution, counterfeit goods, etc) within it's own territory, without much interference on it's part, because it's involved in and making plenty of money from it's own interests.