The street gangs are involved onlybin blue collar crime like drug dealing,murdets,prostitution ecc the members are very young often underage so they can used to murder rival gang nembers without the risk of being tried as an adults,the gang members are ready to spend very long periods of their lives in prisons.
The mob are organizated with a clear hierarchy,are preferred white collar criminals aside blue collar mobsters. The objective is to enjoy the money and avoid prison when is possible. The mob control unions and high level scam.
The bosses are very old because have the experience to run a family while in a street gang the bossesare young because the veterans are dead or in prison.