It hasn't been Cosa Nostra for over 100 years. They were not a criminal organization when they started out, in fact they were the good guys.
The Russians are worldwide and are involved in more rackets and scams than Cosa Nostra. They own banks, politicians and numerous legitimate businesses. In the big trades like drug trafficking and arms trafficking, Cosa Nostra can never compete with the Russians.
cosa nostra started as a criminal organization since the beginning, i mean in sicily
i was talking of the united states anyway, cosa nostra is stronger than russian oc over there
a better comparison would be between italian oc as a whole (sicilian mafia/ndrangheta/camorra/scu) and russian oc as a whole (russian/georgian/ukrainian etc.)
