Of course they are related...they all are! The big question is just how far back does the relationship go...I have two blogs one is: http://cafarella-cincotta.blogspot.com/
and the other is http://cincotta-cafarella.blogspot.com/
I suspect that you are a branch of the family. There are a number of relatives in Rome..Livorno, Campagna(Where the Cafaro family originated) and Calabria. My branch has been in the Aeolian islands since the 1550s, but they did move back and forth...I have names of family from the 1610 census, but do not yet know the connection. Look at the sites and you will at least have some idea of family experience, but pay particular attention to the Piranesi print and the Parco Cafarella..also known as the Parco Caffarella....do not think too much about the spelling differences..they are all the same family though different branches...there were no spelling rules you know...they all descend from the Cafaros...the name means: The unbelievers in Arabic and southern dialect.